There is a guy at our field who has a Mach II. He does all kinds of spins, snaps and what not. I will eventually get one, but I may get a Sig Something Extra in kit form for my next plane. I kind of have the building it myself itch now and want to try to learn how to cover these things. My only complaint about my Mach I and the Mach II's, are the covering scheme. I think it's pretty good quality, I just don't care for the color scheme. I have the red tail version of the Mach I which I have heard, helps with the visibility over the previous versions. We'll find out this weekend weather permitting!