Looks like you did a great job on the zimm,1/48 no less,and nice AB job on the camo.I never tried my own zimm.I do know that only early Jagdpanthers had zimm,and you have the early exhaust on yours,but the extra fan on top of the back deck is for late models.But I also believe it's ok to build it the way YOU like.
One suggestion would be that PE screens over the vents in back really dress up any vehicle,if you find them affordable,it's a good investment.