RE: Modified Curare Build!
Hanno first flew Curare in 1975. He was won the European Championships first time out in September, '75. Two weeks later, he was 2nd to Wolfgang Matt in the WC. In October, '75, he and Wolfgang traded places again. Hanno won the TOC with his first Curare.
For SPA, we currently stretch about 1-1/2 inches, but also slide the wing forward 1". Both are done to help balance the OS91 which is pretty much the standard SPA engine. The firewall goes back 1" to keep the nose the same. Firewall and formers are widened a bit if the engine is to be inverted. Dihedral and anhedral are according to plans. Messing with them will cause mix issues that Hans and Hanno solved long ago.
Purests stop reading. Fix gear, of course, for SPA. Almost exclusively tail draggers.