I have heard you mention in a few of your videos that R12 A/C systems can be converted to R134a. I have done it on 2 vehicles. One is a 1983 Ford F-150 which I still own; and the other is a 1993 Ford Ranger which I no longer have. Can you do a video showing people how to do this conversion? I know that it would have to be on R12 systems that have already leaked out since you would need a certified refrigeration tech to remove the stuff.