Well that is cool. I do all my own a/c work and rather enjoy the satisfaction of creating cold air. Plus, after buying the equipment, the big investment is over and after doing two or three cars you have more than gotten your money back.
I convert most everything over to 134. I can do a quality conversion for less than $100 that will last and last.
Good going! I use an old household a/c pump from a feezer that has new ends soldered onto the housing and a simple on off switch in conjunction with a reagular set of a/c gauges.