How is your Pershing working, so far? I hope you have a good experience.

The smoke and sound functions
are cool. [sm=thumbup.gif].....mine just does not work. [&o]
As far as upgrades, the steel gears sound good to me. I am having a slight problem with the plastic gears in my Tiger 1, because the foremost gear tends to slip from side to side on its axle (grooved), causing the tank to lose turning power. Today, I took the gear boxes out, disassembled them, superglued the gear onto the axle, and put it back together. Now, it turns much better in high traction areas like grass and carpet. [sm=thumbup.gif]
There seem to be more upgrades for the Tiger 1 than the Pershing, though: metal tracks and metal hatches. There are also metal drive wheels for both....if you can buy from the German Ebay.
http://search.ebay.de/_W0QQfrppZ50QQ...QQsassZasiatam
http://search.ebay.com/_W0QQfrppZ25Q...otoysQ2dcanada
Good Luck!
Jason