Hey Onno,
You're not the first one to switch Arjen for Arjan

it happens ALOT.
I'm glad I could help you out with the missing cards.
My day went something like this (from memory):
Match 1 vs Arjan Bos with 5c Keeper Control (I put him on Tezz):
I lock him out of the game fairly fast, he manages to cast an impulse but doesn't really get anything usefull and scoops.
Game 2 is about the same as game 1, he manages to play a Qasali Pridemage and uses it to blow up a chalice but I have a solid hand and lock him out of the game shortly after.
Match 2 vs Maarten Wevers with Oath:
He drops an oath after a few turns but I have a smokestack, I get hit once by a Hellkite Overlord but I topdeck a duplicant and eat the dragon, smokestack eats his board the turn after and he scoops.
Game 2 i keep him off green mana untill I have a chalice @ 2. This game goes on for quite awhile and I have an enormous board with uba masks, null rod, chalices, crucible + strip mine, tangle wires and 3 welders. I kill him eventually with recurring barbarian rings.
Match 3 vs Jasper Wevers with Sui-Black (bitterblossoms are nasty.dec

):
Game 1 is pretty tense, i have a board containing a welder, 2 tangle wires and a smokestack. I keep saccing 1 tangle wire to the smokestack and putting it back into play with welder and manage to lock him down just long enough for his confidant and bitterblossom to kill him.
Game 2 is all his, he drops a confidant, bitterblossom and negator somewhere in the first few turns and I die fast.
Game 3 seems to be going his way with triple wasteland screwing my mana base, at one point I only have an Ubamask and 2 lands (mountain and barbarian ring IIRC) while he has a bitterblossom starting to generate tokens. I topdeck a bazaar and find another one the turn after. I start to desperatly dig for a powder keg by 'drawing' 5 cards per turn. After 2 turns I finally find a powder keg and blow up his tokens, then keep blowing up his new token with a recurring barbarian ring. He slowly dies to his bitterblossom and I win the game with 2 life left.
Match 4 vs Duncan Keijzer with GWSx:
Game 1 I lock him fairly fast, he scoops after a smokestack starts to eat his board.
Game 2 I drop a few lock pieces but he bounces them EOT and combos me out on his turn.
Game 3 I start off with a few lockpieces including a tangle wire, he plays a hurkyl's recall in his upkeep and plays a time walk in his main phase. At this point I thought the game was over since he had plenty of mana and I had nothing to stop him. Fortunately for me he drew no business spells at all and could do nothing but pass the turn. I drop my lock pieces again on my turn and he scoops a few turn later.
Match 5 vs Jaap Brouwer with 5c Stax:
Game 1 I start with shop into crucible, he plays a time walk turn 1 and tinker into a Sundering Titan turn 2. I drop a smokestack on my turn. He plays a Karn on his turn and swings with the titan. I topdeck a welder and play it. He plays a Triskelion on his turn, kills my welder and I scoop.
Game 2 I drop a smokestack and still have mana left to cast a Rack and Ruin, he has a shop, wasteland and mox ruby and plays a memory jar. EOT I rack and ruin the memory jar and mox ruby and waste his wasteland on my turn. Smokestack eats his shop and we go to game 3.
Game 3 he starts with a chalice @ 0 and tinker for triskelion on turn 1. I drop a bazaar and dig for a red mana source to cast 1 of the 2 rack and ruins in my hand, I find a barbarian ring and cast a sol ring. He ancient grudges the sol ring and wastes the barbarian ring and I die to the triskelion before I get to 3 mana.
Match 6 vs Goswin Zeeman with Tezz:
Game 1 I have a solid opening hand of 2x crucible, 1 tangle wire, lotus, mox ruby, strip mine and 1 more card which I can't remember. He thoughseizes me turn 1 and takes the lotus. I topdeck a mana vault and strip lock him.
Game 2 he goes turn 1 land + voltaic key, I drop 2 moxes, sol ring, smokestack and wasteland. Smokestack eats his board and along with a chalice @ 0 and @ 2 lock him out of the game.
Top 4 vs Boaz van Driel with Ichorid:
Game 1 he does his ichorid thing, I strip his bazaar but die a few turns later to zombies.
Game 2 I have welder + tormod's crypt and plenty of artifacts to weld. He scoops after pretty much all his key cards are RFG.
Game 3 he mulls to 5 and opens with unmask taking my Trinisphere which I could have cast on turn 1. Then he drops a bazaar and discards 3 non-dredgers. I waste his bazaar and he's left with 2 cards in his hand and no dredgers in his graveyard. I build up a board with 2 powder kegs, 2 mogg fanatics and a welder by the time he gets to 7 cards and he decides to scoop.
Final vs Hero 't Mannetje with 5c Stax:
He offers a split which I accept.
Sorry if i missed something (which I probably did

) since it's all from memory, I didn't made any notes.
It was a fun tournament and the deck preformed really well, I only had to mulligan twice to 6.
Btw, if you manage to start some vintage in Amsterdam I'll surely try to be there

/Arjen