Hi - I use S410's in both calibres for pest control work on a 5k Acre site in Milton Keynes and have never felt the need for a Reg to be fitted - I charge both guns to 170 then fire 5 shots to bring the guns to zero - this then holds for around 50 shots then I refill at 100 bar ish. Used S410's for ...

Is there not a Tesco near you? - rates are increasing to £9 hr soon plus you get staff discount (as do family members) and they now run a "staff store" whereby unsold items are offered to staff at 1p . Not the most rewarding job in the world maybe but I believe that work (and life ) is what you make...