I don't quite get the comments about bob #3 not being added.  If you think bob flips will kill you, then don't run ANY and pick a different draw engine.  If you realize bobs are good and thus run 2, then running 3 will increase your odds of a turn 1/2 bob 33%, which is when he's best.  That's like saying "Ancestral recalls are good, but I might deck myself sometimes, so I'll only play 1 (if you could run 4)".  If something is good, use it or don't use it, but don't "splash it" with just 2.  Not running 4 is warranted, as you might just draw more bobs of of bobs (but I'd really consider even 4 since you have mostly low cost cards).
Bob Flips will sometimes kill me.
This is just the truth. If you have played Bob, you know this.
Getting a turn one Bob is lovely. Obviously this is the best time to cast one. But do i want to cast another on turn 2? And a third on turn 3?
Not really, no. I won prefer to win instead.
Bob IS strong. But he also has some fundamental weaknesses. Creature kill for instance is an embarrassing way to not draw cards.
Comparing Bob to Ancestral is really just not understanding.
When I have Inifinite turns, Ancestral Recall is not going to kill me.
Having a Bob in play can.
When I cast Ancestral, I draw cards. When I cast Bob, I might draw cards, provided you dont have a lightning bolt. Lightning bolt does not stop an Ancestral.
Ancestral is OBVIOUSLY stronger, but by your reasoning, I should not play it because I am only "splashing one."
The same is true for Lotus and Sol Ring and lots of other stuff.
The strongest card in this type of deck is the FIRST one.
The first enormous/Invisible/Unkillable robot is the best, sure a second is lovely, but the first IS the best. Since this deck is about only playing the best, the fact I play a second Bob really is a statement about the power of the guy. BUT, I really do not want two of him in play. well, sometimes. And sometimes I look at him and want him to be a Blue card. And sometimes I wonder where my Black Mana went. Or wonder why they are playing creature kill in their base deck. 
"If something is good, use it or don't use it"

 Funny !
Why can't I use it the right amount?
Pearl is definitely worth it.
When you have a working version of this deck I will be more inclined to believe you.
Pearl is certainly close. BUT, it only helps cast ONE spell in the base deck with its coloured mana. Getting manascrewed or colourscrewed is a reality for ALL magic decks. That one card not tapping for Blue when it could, irritates me. Because of all the single Blue cantrips, all I need is One Blue Mana a lot of the time. And being this deck, it will generally win if it can get its shit together. Tiny little improvements in stability is what I am striving for, not outrageous first turns. Those will happen if I have the Pearl or not. Pearl improves sprint, but not distance. And when they have outrageous first turns, maybe I can spell pierce, because Tundra taps for Blue.  
This deck does not Mulligan anywhere near as often as any other Type 1 decks.
And sure, replace a wasteland with a pearl, it will goldfish better in practice, no doubt.
Wasteland wrecks opponents, and can win games.
Or, ...Perhaps you have some other suggestion on what to remove to include the Pearl?
That is the rub. 
Figuring out how to sideboard is even harder than playing this beast.
Chalice and null rod don't become significantly better because of ONE extra mox.  But your turn 1 abilities, and the aforementioned Tinker, yawg will, balance, twist DO get significantly better turn 1 - as well as bob + top.
Pfweeeeeet!
Ref!
How come you get to use and draw the pearl on your turn one, but I do not get to play a turn 1 Chalice or Null Rod?
Fair is fair.
In your "I got a Pearl turn 1" example, sure, it is all roses.
And in my counter example "YOU got a Pearl turn 1" and it was WORTHLESS.
Chalice and Null rod DO become significantly better because of the ONE extra MOX they stop in THIS game, the theoretical one you have not played, and the actual ones I have played.
I have looked at the perfect turn 1 infinity turn hand, and conceeded before drawing a card because I only had artifacts, and he went first with a Nether Void. 
Losing to main deck Artifact hatred is no fun.
Reducing the artifact count purely because it can be targetted IS worth doing, it is a weakness, and one I am happy to not have any more.
The MIshra's Factory has been Extremely useful, often because it chooses when it wants to be an artifact. (it can be very funny with the Voltaic key too)
But your turn 1 abilities, and the aforementioned Tinker, yawg will, balance, twist DO get significantly better turn 1 - as well as bob + top.
Yawgies and Twist are NOT good to cast on turn one.
Balance is often not good to cast on the draw.
Tinker, sure is silly, but it still gives the 3 more turns with my robot.
I spoze you are going to tell me I am playing the wrong robot, but I really think you just dont get this deck.
Top turn One or Two does not really matter.
This is Vintage after all...to suggest something is "broken enough" so you are okay with nerfing it a little since it's still good is really unacceptable.

 You REALLY dont get this deck
I play Inky because it is "broken enough".
Blightsteel is more broken.
But Inky wins more games.
And, I do not mind if you find this deck unacceptable.
The bonus of 1 mox FAR outweighs the times it will bite you.
But if I dont play it, it CAN'T bite me.
Turn 1 chalice @ 0 while you hold the mox pearl sucks, but isn't back breaking.
Sure.
You want to win LOTS. I just want to win.
You want to not get your back broken. I dont want to give them the chance.
And me Wasting / Stripmining their only colour source could be back breaking to them.
Turn 1 two land + confidant, while your opponent plays sapphire/island on turn 2 to drain your bob and then dump into jace? Yeah...much worse.  Had you the pearl instead of tundra there, you land bob and probably win that game.
Can You have the Pearl instead of the Sapphire? (you just lose)
Why do you get the ONE good mox, and not the other FOUR crappy ones?
Do you really think an on the play mana drain turn one off an Island and sapphire is a reasonable thing to expect to face every game?
Can i Force of Will the Jace now?
Why did I not spell pierce their Sapphire on turn one?
Stripmine their Island.
And laugh at their double blue spell that will never be cast as they draw off-colour Moxen? 
OK, sure, in your example, I drew a tolarian academy and a seat of the synod, what does it matter that I got a Bob? No Black mana in the area. Good thing I am only playing 2, a second one in hand might be a lost game for me.
Overall, your deck is solid...

 Solid like a fat dwarf.
but i think the 1 on color mox and a 3rd bob are huge.
And 62 cards seems bad.
What do you think should be deleted to include them?
Suddenly I want to be playing all these extra Moxen because sudden I am relying on a turn 1 Bob, and suddenly I am weak to creature kill as well as artifact kill...
(Currently I am enjoying the sideboarded Engineered plague, naming Wizard.)
You say you don't have a lot of colorless eaters? Bobs, top, balance, yawg will, mind twist, sol ring, key, vault, tezz, hurks, fof, walk, tinker, control magic, scroll, most of your SB....I actually see MORE colorless using cards than not in your list.
I dont.
Bob = 1
Top = 1  (+1+1...)
Balance =1
Solring = -1
Key = 1 +1
Vault = 2
Scroll = 1
Hurkyls =1
Walk =1
Yawgies =2
Tinker =2
Control Magic =2
Tezz = 3
FoF = 3
Mindtwist =X
Of that lot, the stuff that "takes" colourless is the stuff that takes more than one.
I would count as Yawgies, Tinker, Control Magic, Tezz, FoF & Mindtwist.
I do not need to cast any of them on turn 1.
Being able to is lovely with the nuts draw, but as you demonstrated, the nuts draw often does not involve off colour moxen. Give me a SOl ring instead any day.
The deck you are describing is a solid type one staple - Tezz. It works.
But it does have holes that other decks exploit, and it aint this deck.