It is really cool Looking at the stats, though, I'd make this panzer actually a bit cheaper than ost p4 fuelwise (100 probably) to make players really produce lots of them and those longer repairs would make it not a great investment in the long run. If possible I would even make it unrepairable above 80-90% to make it even more fun (if that is possible to code of course).
It already arrives 60 fuel earlier, because it doesn't require Panzer Authorization. I considered making it cheaper, but figured that in combination with it arriving earlier than any other medium armour would make it too powerful.
I wanted to avoid giving it different stats, as the general rule of thumb for reused vehicles in CoH2 (OH Panzer IV, M10, M5 Halftrack, etc.) is that they have the same base stats.
Making it unrepairable above certain threshold is probably impossible - a better solution would be to just give it 80-90% HP of regular Panzer IV, but as I mentioned before, it would go against the rule of thumb.
Thanks for sharing your thoughts in detail!