RE: Engine selection
rc-freak15,
I hate to burst your bubble, but the control surfaces on the tail of the Uproar are going to limit your 3D capabilities. If you want 3D, it pretty much is in the name of the plane these days. You will need control surfaces that take up about 50% of the stabilizer and rudder with double-beveled edges, (you can always do some surgery). I know, I know, it may hover for a little bit as is, but to really get the control response when the only air moving over the surfaces is from the thrust of the engine, you really need 3D surfaces.
As far as the engine goes, I've had 2 Super Tigre G90's now, (3 if you count the one I had to send back to replace the second) and both ran great... eventually. The first one was perfect right out of the box. The second took a LOT of fidgeting to finally get the low-end happy. The low-end needle is VERY touchy. When they say to adjust it in 1/8" increments, they aren't kidding! Be very patient and follow the break-in procedures in the manual.
I used Master Airscrew 14X6 props on both. With your tuned pipe, you'll get that nice supersonic sound in a dive at full throttle.
People like to trash Super Tigre engines, mostly because they are on the more affordable side of the spectrum. They are not as user-friendly at first, but once you get them dialed in, they'll perform just as well if not better than their expensive competition.
Good luck.