I flew one that was built from the kit and it was a blast to fly. The guy built it and put a MDS .68 in it. It had plenty of power. It was covered with coverite and painted, so I think it was a bit on the heavy side. I think with a .90 in it, you could really have some fun, but is it worth the extra work? Now if you want to do some modification, put in a set of retracts. That would make a huge difference in my opinion.

Good luck!