MF010, where you mention the yellow part that looks like the base of a turret, always looked to me like the rear top engine deck of an M60 style tank. It's a shape unique to these tanks.
Nick, I am not very certain about that part. It looks to me to be from the Kubelwagen, but I don't know what size/scale, and it could be from something else even. Maybe we could get some help to nail it down with at least a little more certainty before you fork over your hard-earned cash.Cheers for the note on the big Kublewagon disk. I'll see if I can pick one up, both for that and the engine deck bonnet cover part.
Around 90 hi res shots of the 5 footer in a zip file to download :cool