Reloading on the field can be restricted in limited ammo cap scenarios. I don't think reloading gas is frowned upon because it's not a projectile. Ammo caps typically are a projectile limit. While it may be of limited use to refill gas but not pellets, it is very useful to be able to portably fill a mag that you forgot to fill or top up a partial fill.
Thanks for the support guys! Manchovie did a beautiful job on the infomercial. Getting the reservoir in at the end was a last minute add. We're in the midst of label production. We'll have a wrap around label with a lubrication guide on it as well as important warnings.
Want nearly free GBB gas?