I researched and tried to buy a Bauer used but couldn’t find one, so I looked for new and even that was was hard to find one and when I did it’s was priced way out of sight. I tried to buy a Airetex but they never Answered or returned my phone calls or emails. I was about to say the hell with it and I called Alkin in NJ and they answered everything that I asked and they sent me info on the compressor I might want. So I finally decided to buy it from them and then they were out of the 220V motors, but they called the following week and said they received there motors so I bought one from them and they shipped the next day and I received it 3 days later. I bought the AkinsW-31 vertical, I love it a couple other shooters in my area took a look at mine and they are going to buy one as well. They are kinda pricey at $3900 but it’s better than driving 1 hour to get air from the dive shop and only get 4000 to 4100 psi every time.