thanks for all the sympathy.
welding would not be an option as the engine was not even running 2 houers since rebuilt.
i am very happy that i recieved an message today from the supplyer that they exchange the head without question!
that message makes life a little bit easyer now...

will keep going the project so i can do a new try next season

the only hurdle is that the pistonring on the infamous cylinder had begun to rust into the cylinder

i'l wait to see howi can cope with this problem


0.10 mm is a bit much for honing isn't it?