Nice review, Kevin!
Cyber Hobby sometimes finds very very unique subjects for it's white-box specials. This one, I think, counts as such "big time". The kit and subject actually look pretty cool - a sort of mini-version of that SdKfz 251/22 with the 7.5cm PaK 40 - a bigger rack with a bigger gun, but otherwise very similar in set-up! Sounds like the kit should build up pretty nicely.
About the subject... Actually, this thing exists at least until quite recently in a museum-yard in Belgrad, IIRC. Where it has been for a couple - 3 decades or more. There is no known evidence that the Germans ever actually built this - more likely something created by the Yugo's after 1945 using the available cast-offs of the Germans. It is almost certainly a one-of-a-kind.
There has been some discussion of this one on more than one thread and site. IMHO, CH may have reached a bit far with this one - certainly in terms of suggesting a German marking, but it really does look quite cool and I'm going to build one just because of this - leaving off any putative German markings but maybe creating a Yugo marking for it?
Bob