I purchased a Hobbistar 60 and put a saito 100 on it and put a 3 blade prop on it to control the speed. More than enough power. Here is a video of mine.4 strokes are normally about the same weight when you compare the same class .60 2c to a .90 4c. OS 4c are usually a little heavier than other manf. I say put it on there you will be fine!!!!!!!!!!!!!!!!!!!!!

[youtube]http://www.youtube.com/watch?v=AsNyTy1T9l0[/youtube]

This plane came out on the light side of the recommended weight, and I had to add about 2.5oz to the nose to balance it out.