received this 50 anniversary fox 35 stunt still in the box .it it was gummed up so pulled the back plate off and it looked like a 29 crank in it with a smaller counter weight . looking in the exhost the port was so narrow it looked like the sleeve was in backwards.there was no indication it had been taken apart ..i installed a 35 crank in it and put it back together ,it has great compression .has anyone seen a fox 35 with a narrow exhost port .normally they are cut back almost to he case.or this type crank in it RAD