i need a indestructable rear diff, please help

[blueb8llz]

i already checked ebay haha. thats always what i do before i make any purchases.
$160 for two complete sets is a very good deal. theres absolutely none on ebay as of right now. but i only need the rear set anyways...so the UE ultralite and flm cup with ring/pinion gear is about $100 not including shipping. and i wont need anything else because ill just throw everything else from my stock diffs into the new diff housings.
im just not sure about the shim sizes, and the fit with the ultralites onto plastic TRX bulks.
i found a very good link about a guy shimming his tmaxx, he uses this size shims...are these the exact same sizes i will need:
http://monster.traxxas.com/showthrea...=diff+shimming