Just wondering, have not seen that many mxs crankshaft failures up here. I agree with performing a inframe, that new OPT warranty for 4/400 000 is a good deal.
If you want more power after the inframe, you could get another ecm, flash to 625hp. That way you can keep your warranty for the full 4 years, your stock ecm will not get many miles on it. I have not had anyone try the 625 hp on top of the pp box.