I recently came across a used Skyhawk GTS frame and would like to build it up with a 4 stroke 212cc engine, but when I look at other build photos online (Even though I havent been able to find many) It looks like a very! tight fit on most frames. Was hoping that someone else has done this before so I can go into it kind of knowing what to expect. If not, I'll try to keep this updated on what I come across. My funds are limited though, so it may take me a while to do things.