The motor I am using is the o.s. 1.60fx 2-stroke. The speed square is great for making shore that the horns are perfectly straight to one another, Try it and you will see how easy it makes doing control linkages!
it takes most of the worrying but you should still double and triple check every thing any way no matter what you are building, Foamy or 40%, it will only fly as well as it was built.
Clayton Wheaton