What kind of results have you had replacing R-22 with MO99 or some of the other "Drop IN" replacements for R-22? I have not used any of the replacements, the cost is not much different, plus I was told you loose 5-6% of the system capacity. Most of the info. I have is from some of the sales reps from different supply houses, have not actually talked to anyone who used the replacements that know what theyre doing. Was curious to see what others think of the new replacements. I believe there will be some that work well kind of like using 409a in place of R-12 which I have been using on a few walk-in coolers which seem to be functioning correctly now.