Great work as usual, Jon. I'm really looking forward to seeing the Pz 2 at the Yorkshire Wartime Experience, if you're still intending to unveil it there when it's finished.
Something I've been wondering about for a while though... have you given any thought to servicing during your build, since you've been using non-standard drivetrain components? Will you have good access to drain plugs, filters, etc.?
Also, have you made up your mind yet about the best approach for the tracks?