We ended up using a really sweet Thunder Tiger 46 Pro on the Nexstar (the 46 FX Ichose had a liner problem, go figure, and Bruce was great about standing behind it).
It went together without too much hassle despite the stock mount giving me a few fits.
It took 1.5 OZ of lead to balance it, wish it hadnt but it is still a pretty light airplane for its size. Cant wait to see how it performs with just a 46, seems like a really big plane for such a small engine, but then again I have been flying my GP Escapade a lot and its a tiny plane with a big engine.