Thank you all very much. This one has been sitting in the back of my mind for quite a while. I first thought of the idea back in 2008 when I was designing a strategic wargame based on a PRC intervention into the Siberian oilfields of a Russia that was recovering from a WW3 type scenario in 1993 (a previous series of games). It is very much meant to be a wartime/all hands to the pumps expedience and so is good enough as opposed to perfect. So... clunky autoloader - yup, right in the commander's face - yup, German RWS copied from captured vehicles - yup, gas turbine to make up for loss of engine space - yup. But what you end up with is a 3-man, light weight, highly mobile, heavy hitting AT gun system that is ideally suited for scooting about the Siberian forests.
As promised, I will post the finished model with full backstory in the Land thread... ... ... Ah, just noticed it has already been moved into the land thread.
In that case watch this space.