Thanks for your ideas!
The hangarlift is veri nice, but not an option

bevause the hangat has a big floor ... and a big door ... the space in the corners are allready filled and in the middle there needs to be free space to tear planes out.
That aluminum bar ... that would be really an option ... or additionally "hard-points" on the fuselage side to screw in hooks and lift up like this.
I also thought to make an adittional oildoor on the cowling, right in the corners, so that an hook can go around the enginemount ...
Lets thinking a bit more ...
for shure I will contact an engineer to calculate everything.
Any further coments are welcome!
Dominik