That master shuttle kit is a lot of fun. I built it some time back and it was a challenge. The hardest part was the shuttle. Mine came with damaged plastic so I had to use a lot of Testors putty to fix the nose. I did fly it and it flew real nice. The shuttle comes down a little fast, but other than that it is a nice flyer. Here is a link to that build. Hope it helps.
http://forums.rocketshoppe.com/show...t=space+shuttle