I noticed a pump autococker listed on craigslist near me. It looks like a 99 cocker to me (side feed). It comes with a few pods, a belt and 2 Co2 tanks. I know very little about cockers. This one does not come with a vertical regulator. The duck bill ASA attaches to the vertical adapter via a macro line. Now, this is where the stoopid question comes in; isn't a regulator needed to control velocity? I considered that the guy may have used a tank with an adjustable reg but then why does it come with Co2 tanks? The price on this is low enough that it seems like a no-brainer to me but my lack of experience with cockers has me questioning getting it. I know vertical regs are fairly cheap. Thoughts?