Thanks for replying guys! I'm currently fabricating my own gearbox x member so I will pissed at myself if I end up with a vibration I could have overted. 'Research twice, weld once' is this weeks mantra!



It's the 2 piece prop that is confuzzling this, can I treat the first half of the 2 piece prop with the same rules as the above single piece guide??

I could find out the original engine angle but I also added a larger gearbox so even if I got the same engine angle the position of the output shaft would be different I think!! And therefor the prop angle.... I went from a t9 to a t5

My brain is hurting on this so all advice welcomed...[/QUOTE]