ASAT,

I used I beleive the 1/4(?) scale robarts, I dont have the packaging any more, but if you look at the sizes available, they are the obvious choice. If you have a Robart hinge jig, they are the size that require the large jig. Anyway, I used the same size all around with no problem fitting them. I have seven in each aileron, five in each elevator, and six in the rudder, should be fairly bulletproof. Hope this helps, if you need exact specs, I can measure mine for you.