My AireTex/Alkin W-31 at work...Got it used on E-bay for $2300.00 If I remember right. I could not be happier and I'm sure it's some of the best coin I've ever spent on diving related gear. 2nd picture shows most of the service kit for it. Parts not shown are the absorbent and charcoal media. If you can change your oil you can service a compressor like this. Uses a simple 220V dryer style hookup or you can easily put on a 5hp engine, change the pulley and go gas!!!
They have an even smaller one that pumps the same CFM called the Atlantic and it looks like a winner too.
Atlantic Compressor click here

