Have had a Tomboy since 1980, Mills .75 orig, and its been thrashed, but never crashed. A fantastic Smeed design. Very strongly suggest you extend the hardwood engine mounts an extra couple of inches (cm) into the next fusalage former. IMHO the way it is on the plan is weak, and this mod fixes that and adds minimal weight where you need it. C/G about 50% about right. Re. incidence, simply make sure the wing is at approx 1/8 'higher' than the stab (tailplane).Fit a D/T timer, good luck.