Dan I did the TankArmy metal wheels on my Pershing and they're a great kit.
I bugged them about not having the metal suspension arms for the forward 2 wheels as they are different and have that funny Pershing interlock... but look what I just found.
http://tankarmy.com/heng-long-tank/p...ensions-p-1448
I've only seen these on their site & their eBay account.. I'd get them but the shipping...