Now just curious but let's say you find that an R-22 system is over charged (-2 superheat). Well your lovely recovery machine won't start and have no idea why. So you just do what you have to and bleed it out. Should it be bled out of liquid side or suction line? Or does it even matter? And one more thing, why would you have 22 locking caps on a 410 condenser. I only assume they make them differently for a reason no?