Has anyone used the r-22a refrigerant .If so ,how did it turn out. Havent used it yet but i am debating due to the cost.I know its not ideal but for old equipment it could be ok i think Im referring to the superfreeze r22ahttp://www.super-freeze.com/super-freeze-22a-refrigerant-r22-freon-replacement-30-lb-equivalent-tank/ld