I'm 5'9" and very skinny, and I can tell you, you'll have to mod the hell out of FX get a good fit. It's also the least screen accurate. I'm midway through my build, and I've had to cut away an unbelievable amount of plastic. I severely wish I'd gone for ATA, and if I do a second kit it will be ATA. So much better, in my opinion. FX/AM is great for monster-sized troopers, but a lot of work for us little guys.