RE: 2 stroke.
Good afternoon!
I have a 4 Star 60 that I've powered with both a Saito 100 and a ST .75.
Right now, it has the ST 75 and that is my prefered set up. The 4 Star serves as my "quickstrike" plane. Always in my car, ready to go at a moments notice. The 2stroke requires after run oil, but I don't have to jerk around with shooting up the breather vent like on a 4 stroke to ensure good bearing coverage.
Easy and fast. The 75 and the 4 Star is a great, great combo. Good vertical, good top end, good pull on the tall grass fields.