Tom's right, Carl. As tempting as the static model is, you're better off buying the full-option version when you compare what each offers- relative to your dollar outlay. I should know...i've spent months doing it
The full-option kit has all you need, but if you preferred a Clark (Stian special) or IBU2 heart, then you could always sell the Tamiya DMD/MFUs on. Currently.. they'd probably fetch between 250-350 dollars unused, so you'd still be appreciably better off.
I saw the static kits for the Abrams and JagdPanzer IV/70 Lang, and was sorely tempted, until I began a wee bit of arithmetic...
My current Pz IV build is just an experiment to see whether all the parts can be sourced individually, and assembled in instalments, without the initial shock of the Kit's ever-increasing price tag. It's sheer financial folly, probably, but I've enjoyed the detective work, and the enforced learning curve..
BUT..it really is a fun model to build

"Get your facts first, and then you can distort them as much as you please"- Mark Twain.