Stop in for a cup of coffee

I'm hung up on a project, disassemble/clean/lube of turntable motor. Had medium duty snap ring pliers, broke them. Large was recommended. I tried a large regular screwdriver, twisting it but it's going to take a lot more force to split this motor case. Pretty precision motor, have to slowly split it where the two screws that held it together went through the case (as to not damage bearings etc.). Any ideas anyone? May have to wait to get the right tool damn!