I just got an old ART Levelar compressor off of ebay and it is a fine piece of equipment. However, the transformer included with it was really old/brittle and broke in half when I pulled it out of the wall socked, so now I need a new one. The specs on it are 9Vac/800 miliAmps. I am wondering how important the mA rating is- I have a few transformers around the house but they are 300mA. Anyone know how this stuff works?