Gene,

I built mine pretty much standard. The cowl didn't add much and looks nice. As far as the wingtips go, if I did one again I'd leave them off and replace them with light ply tip plates. The profile canopy does nothing - I've seen many with it left off.

I used a Magnum .21 with mine. Keep it light and mind the balance point and its a great little speedster. Good luck with yours.

Best,
Kelly