Ive seen the same thing happen with Jasper motors that you guys have seen with Advance motors, Cperry is right its mostly the machining that dictates whether or not a motor is going to hold together or whether its going to blow every seal out in it. Im rebuilding a 22re now and the shop that built the motor bored it .004 over spec and lined the rings up on assembly, the seals didnt stand a chance. Be careful who you use, i use a very good machine shop and have never had a issue with any motor they machined/that ive built.
