A highly detailed polygonal model, very nicely done indeed, also to be completely honest I’d say pretty much close to CAD data output in all intents and purposes, combined with that suspension rig as an awesome example in the Dark Art of realistic hardsurface modelling. 
To that end, if you don’t mind me asking just in brief, if you’re inclined, could you please describe the process as too how you arrived at that particular solution?
[to be clear, animating the tank’s suspension]
The reason I ask, is that I’m currently wrestling a possible avenue forward of a sort in a simular context, but stuffing it up thus far.
Cheers 