There are 2 common sizes used for the ailerons and the other control surfaces as well for that matter. The first uses steel push rods called 2-56 for the size. It has a diameter of 0.074". The second one is heavier duty called 4-40 in size and has a diameter of 0.095". On glue types there are a usually a combination that is used. Either epoxy and CA or wood glue and CA. Epoxy works faster but wood glue is lighter. 5 minute epoxy is used for areas not requiring a lot of strength. 15 or 30 minutes epoxy is used where more strength is needed. It has more time to soak into the wood and is stronger and less brittle. CA is sometimes called Super glue but the hobby versions has 3 differnt thicknesses. Medium thickness works well for most applications except CA hinges where you need the thin verson in order to wick into the material. For radio control, there are about 50 channels available in the 72 mhz band that is reserved for Rc aircraft only. Common repair parts, if its a bad crash then it might take less time to build a new kit. If its a minor crash, in a lot of cases all you need to do is squeeze the split sides together, and reglue with epoxy. If the sheeting is split then flow some CA in the crack. The better engines are tough as nails and can handle crashes. You will almost always need a new prop and maybe a new spinner. You will also probably need some new covering. You will need to remove the old stuff in the break areas to inspect the damage and effect repairs. Some servos may end up with stripped gears as well and need to be replace. For aircraft modification, add balsa, more glue, and more covering. You may also need more hinges. I prefer the plastic type with the metel pin between them. That should cover most of your info. [8D]