Thanks Rick Miley
I now have my certification for r12 and r22
The 533 uses the same compressor that the 500 did but the 533 has a blower motor which well no other way to say it sucks (normal german 80s a/c)
I'm buying a leak detector and some cans of r12 for a fridge at my dad's resturant and my car.
I just have to get some gauges and read some mannuals on the proper ways to charge (more than was required for the test)
I think i will check for leaks and then if there are non top off my system just to get through summer
thanks to all