A guy gave me a 500 because it stopped working. Lower bearing had seized up. The kit is ordered. Where are they leaking at? With the amount of pressure they put I can see everything needs to be in good shape, even on my race car I don’t need 40 psi so I’ll cut it back to 15-20 which will lessen the wear and tear on seals and bearings. Im thinking a pressure rheostat type deal that would help on heat and battery drain. btw where are those bearings made? I hope not China.