The Boosters do not need a large compressor, I have one of the small very quiet compressors to run mine. It allows you to use a much larger quantity of air from your scuba tanks before they require refilling. Unlike what might have been said, Boosters are extremely simple, there is a low pressure high volume chamber and a small high pressure low volume chamber. It takes a couple of minutes to take the booster pump apart to service it, very simple design. I have just bought an Omega compressor to fill my own scuba tanks which might be overkill since 2 full tanks using my booster pump will last me almost all year. I do not use a huge amount of air, just for testing LDC's on guns before I ship them. I have had no issues with my booster pump and have owned it now for about 2 years. The booster pump is very simple to operate, you attach low pressure air to the main cylinder and a scuba tank to the high pressure cylinder and the gun to the high pressure cylinder, then operate a lever that pressurizes the main cylinder, this cycles the small cylinder and pushes high pressure air into the gun. It takes very little time to fill a gun, depending on the size of the air tube I can go from 2000 psi to 3000 psi with only a few actuation's of the pump. They develop very little heat or moisture, but you do need to make sure that the air being fed to them is also moisture free. They are a great alternative to owning a high pressure compressor, if my dive shop was more reliable I would not have invested in my Omega compressor, but it has taken anywhere up to 3 weeks for me to get my tanks back from them before so I had to get my own source of air, Neil.
30 cal my booster came complete with the hose and gauge to attach to the gun, all it needed was air fittings to fit to my air compressor, which most air operated units require because the maker has no idea what fittings you use at home.It takes a couple of minutes to assemble the unit for use when you get it, very simple.