Wondering which engine I should use in my aviomodelli bipe special. Manufacturer suggests a TT pro61, but I think that for a WS55” 8-8,5lb model a .61 may be weak. I considered a lot of engines (ST G90, Tower 75, Gms 76, mvvs77), but all I came up with is confusion! Please help! Has anybody used a 2-stroke with this model?

thank you
david