The 60 ARC Stang flys great, mine has a st90 with a perry pump and carb and it is breath taking! The century jet retracts w/olio struts(mechanicals)are sloppy but have performed well.The thing takes off well ,but will tork to the left quite a bit but is controllable. I always land with full flaps and wheel land it ,it is so sweet to land. With gobs of flaps coming in to hot is never a problem. Now with a st90 of course dead sticks will ocur in which i'll suck up the gear and flaps and, belly it in on that beautifull scoop, no problem. It loops and rolls nice and knife edges,havent snap it though.It can cover some ground fast and you now its a mustang in the air ,you'll love it. Now the antique motor mts are crap and will loosen up . I updated mine to a more conventional setup.Good luck, Jay