Welcome to the Dark Side, Asmodeuss. I only know of one place where you can buy just the metal swing arms, and you have to buy them in pairs. All 14 runs about $28 and you need 7 pairs. I think there's another RC Tanker that's emailing them to ask so maybe he'll chime in.

https://www.aliexpress.com/store/pro...608.0.0.DK90f9

As for the idler adjust, I just got the last one that ETO had in stock but I think you can get one from the UK and believe it or not, for such a small item the shipping isn't mind boggling, maybe $8 to $15 USD. I'd ask Forgebear where to find one, and if you need help finding forgebear tell me and I'll assist.

You might try the UK for the axle bearings you want, maybe Tankzone or Welsh Dragon. Schumo makes them for the Sherman, but I don't know about the M1.

You might take a look at this thread

http://www.rcuniverse.com/forum/rc-t...er-wow-x3.html

What kind of tracks did yours come with? Got any photos?