I've tried to get a Pro in Houston to do the work but no one is interested. I know how to purge the SO2 but I am not familiar with how to charge the system with Freon. R124 specifically. The folks at the monitortop forums have had success with it as a
drop-in replacement. I have the universal cert and the R124 but no experience. Any tips or pointers to videos, books, or guides are appreciated.