It looks like an auto repair shop or something fro...

It looks like an auto repair shop or something from the outside, but look for the "open" sign on the door. I didn't have any trouble finding street parking right out front on a weekday. Friendly staff. Filling a small paintball tank cost $10 plus tax, so $10.93 total. I'm using the tank for carbonation, so I prefer to get my CO2 from here than from a paintball or home repair place. This is also the only place I could find in urban Chicago that offers this. The customer part of the store was small, but the walls were packed with stuff, and it looked lie they could get and/or build whatever you need. They had a few sample kegerators set up inside, so it seemed like they knew what they were doing. This will be my go-to for CO2, and I'd recommend them for any beverage equipment needs.