Jim,
The instructions regarding the rear end are a little confusing. I studied them for a while, before I actually put it together. I also found the instructions at step 6 confusing, where you place the screws when joining the two front halves together.
I am not in a hurry to have to replace a diff either. A major disassembly will have to take place, alot more time consuming than a MO3. Even changing wheel bases will take longer.
Regards,
Calvin.