I have a Puncher pro and a Hi Cap both in .22 that I have been playing with. The pro I fitted a lanes regulator which gave it a huge shot count but it did look ugly with it sticking out of the lovely walnut stock.
The hi cap comes with 2 bottles but you can't fit a reg to it so I just swapped the 2 bottle systems over!
The Reg fitted with a large plenum suits the military look of the Hi cap and set at 50 bar gives a huge consistent shot count and the Pro now has the benefit of 2 bottle which are just a straight forward unscrew to swap.
Certainly saves lugging my divers bottle down the range!