When do you plan on flying this plane?

I'd put the trainer through its paces first. You'd be surprised what your little Mach-1 is actually capable of.

Then I'd step up to something like a nice low-wing sport plane, Stik, etc.

As opjose pointed out, the U-Can-Do flutters very easy and it can also be fragile since it is built to be as light as possible for its size. It is a nice flying plane of course; it just has some flaws that people need to be aware of.

The H-9 Twist might be a good option but I'd put it off until at least plane #3.

When the time is right and you are really serious about 3D, look at a profile. I dabbled in 3D flying a little and found them to perform better than just about anything. Turns out 3D wasn't my thing though.

www.ohiomodelplanes.com

www.swanyshouse.com