Yes Dave,unfortunately I couldn't locate a source for the Advance caps.At least the ones i was able to find though aren't the cheap metal cased ones found in the Magnatek ballasts i have.They just came in the mail today so I'l be wireing one up to the M58/H37 I'm useing to fire my 250w `saki.Next test is to see if i can "let the smoke out" of this XM10k i got laying around.That bulb is super bright with just a standard 15uF cap,Its gonna be intereseting to see how it performs with a 22.5uF cap.