i have had some trouble with the wristpin snapring failing on a rear exhaust tuned pipe engine with only the rear snapring failing. it of course ruined the piston and sleeve. its an ABC engine. its happened twice now with one end of the ring breaking off and doing the damage. should the ring be placed in a certain position in the groove? maybe i should try and find a snap ring with no holes for removal. the picture is of the ruined one and one that is new. any suggestions? thanks