One other option to consider is the Megatech .15. Dual ball bearing engine that looks oh so surprisingly like the OS .15 CVA . The CVA uses a dual needle valve whereas the Megatech is using an OS single needle valve which is a million times better than the magum carb/needle so you don't have to worry about leaks in the needle and fuel tubing fixes. All this for $49.99....don't look at the Horizon Hobby site since they charge the suggested retail. All other places I have seen charge $50, thus SSC legal.

Bill Davis
Manassas VA