Hmmm...Tamiya don't do BB's, IR is their prime forte. However, when you get started, do post a question or two, and I'm sure some of us vets will answer you well. There's lots you can do, but not a lot you HAVE to do, on the KT. Basically it's a good platform, and a relatively easy build OTB. You can do as little or as much as you want, and still have a darned good tank.
Sev