http://www.ebay.co.uk/itm/RAP4-In-Line-On-Off-Air-Adapter-S-2-/390472642764?pt=UK_Sporting_Goods_Paintballing&hash=item5ae9fbb0cc&_uhb=1#ht_500wt_923You can get an on/off that goes between the tank and the asa for about £20, there's normally one on eBay. (would link but I'm posting from my iPod touch).
That's the one, works a treat...http://www.ebay.co.uk/itm/RAP4-In-Line-On-Off-Air-Adapter-S-2-/390472642764?pt=UK_Sporting_Goods_Paintballing&hash=item5ae9fbb0cc&_uhb=1#ht_500wt_923
like this one? Would this work on an air system?
Actually the first one was a smart parts on/off extender. Still have one knocking around somewhere even though I dont have a mini anymore!That's the one, works a treat...
No real reason not to have one to be honest.
It makes removing an air bottle from the Mini a lot easier and allows the marker to be de-gassed while still having the bottle attached. You can't do that with the Mini in the stock flavour...
I found that after a few uses, it even managed to start purging the air from the Mini, de-gassing it completely after unscrewing the on/off.
New Designz make the original one, it's called the Thread Saver On/Off (TSO). I think Rap4 carry it for them, or possibly from an alternative manufacturer.