I think blaster bust their piston up because of no thrust washers alot of side to side when the piston is on the pin. I never understood why they done that. I can go from first hand about not running thrust washer in the lt.it run with out them but the piston doesnt last to long or the pin  that hold the rings in place either.  New owner and didn know about any forums at the time. Also wiseco said I didnt need them. Hell they make the piston and didnt know.