If you're in the Phoenix, AZ area I have an MXUS 3k that should be a v3 (but I don't know for sure), either 4 or 5t (I never remember which is which on the two I have). IIRC this one hasn't broken it's axle yet (I know for sure the ohter did, I had to weld the end back on to keep using it...and it also had a factory defect in the winding insulation I had to fix).
There's some info about it in the SB Cruiser thread in posts from a few years back if you want to look at it now. Otherwise, if you are interested I can find the details and post them here, but I don't know how long that will take.