I'm looking for something fairly uncomplicated. Best, most reliable models out there? Typical capacity, etc? POS models to avoid? Hoping I can use my air compressor to fill some reusable cans vs. buying CO2. Maybe I'm dreaming... Has anyone ever reused an empty Coleman lantern/stove propane can for an application like this? Total noob with BB's beyond pump plinkers. Thanks in advance for any helpful info!