So I decided to take it to a local tournament with the following list:
Team Tinker - The Perfect Belcher
1 Ancetral
1 Mystical
1 DT
1 Vampiric
1 Consultation
1 Spoils
1 Tinker
1 Twister
1 Wheel
1 Windfall
1 Jar
1 Will
1 Bargain
1 Necro
3 Tendrils
4 Belcher
4 Land Grant
4 ESG
3 Tinder Wall
1 Channel
4 Dark Ritual
4 Cabal Ritual
1 Lotus
4 Moxen (I don´t have the Pearl)
1 Crypt
1 Vault
1 Petal
1 LED
1 Grim
1 Chrome mox
1 Sol Ring
3 Chromatic Sphere
3 Pentad Prism (Mon is right, they are amazing!!)
1 Bayou
We played 5 rounds of swiss (24 players attending) and I faced the following decks:
Round 1: random.dec
Round 2: 4cc
Round 3: Rector Tendrils
Round 4: Rector Tendrils
Round 5: Tog
I went 4-1 => 2nd place with only one loss in the finals against tog. (I will turn to that again later on)
After four rounds my winning-average looked like this:
4(!) 1st turn kills (2 against 4cc, 1 against RectorTendrils, 1 against random.dec)
2 2nd turn kills
1 3rd turn kill
1 4th turn kill
That makes a first turn kill average of 50% :lol: (quite nice).
The 5th round against Tog:
I kept a hand with Mox G, Land Grant, Cabal Ritual, C-Sphere, Belcher, ESG and Pentad Prism.
He starts with Tropical Island-go and plays Ancestral in my upkeep. I draw (not sure what) and play Land Grant -no counter. Bayou, Ritual, ESG for Belcher-no counter....go
He strips my Bayou and plays a Pearl- go.
I draw demonic consultation and pass. He plays land Pernicious Deed and sacs for zero - ouch! Response I tap the Mox, sac sphere for black and play the consultation for lotus which will win me the game next turn. Unfortunately, the first card I have to remove is.....sure, Black Lotus

2nd game I can´t finish him early enough so that he is able to play deed again, gain control of the game and win...
Though the last consultation was really, really annoying, playing the deck was a real blast and much fun. Therefore, thanks to CAB for posting the list!
The only problem I had with it was sideboarding sth out. Because every single card seems to be needed as it is either a bomb, a mana source or a kill card....so I often randomly sided out the spoils, one tendrils/ belcher to put in duress, xantid swarm or deconstruct/ naturalize- which were at the same time the only cards that proved to be necessary.....
Thus, I would appreciate any recommendations towards other sideboard-techs that I did not think of. Of course any comments on the maindeck are also welcome.