The gauge that came with my Badger Million Air was a good gauge but the numbering was such that any small changes in pressure was not possible as there were only marks at the 10, 20 and 30 psi positions.
I picked up another gauge on Ebay for $4.95 and $3.95 shipping and now have control from 1-60 psi.
The gauge also has a nice metal housing and not plastic like many are. 
The original gauge is on the left and the new one is on the right. If anyone is looking for a gauge like this shoot me a note and I will give you the link to the seller.
