Thanks for your advice,
I'm allways on the rich side of Life ;-)
Today I've found my final setting and enjoyed some flawless flights with mounted cowling - it has last one gallon of fuel to test around but now I'm ready for routine.
I can't wait to mount my stocked 63S in an Ultimate.
A hurray for YS and two thumbs up for this helpfull Forum!
http://www.youtube.com/watch?v=A5n4HW7A3es