U will get tennis elbow in your triger finger then blame me for your suckey shooting then u will need to take the infomercial all natural joint pain releaf crap lol. Sorry I couldn't help myself!! sure u could boost into your 4500 from your scuba but isnt that air better put into the gun directly for shooting. I BOOST INTO MY 5K 114CI ALL THE TIME ABOUT 15 STROKES GIVE OR TAKE . REMEMBER GUYS THE GUN TAKES RUFLY 1/4 THE AIR OF THAT SMALL CARBON TANK.A SMALL EVIN 2800 PSI COMPRESSOR FAIRLY CHEAP A BOOSTER SCUBA N YOUR SCBA WOULD B FEASABLE FOR 4500 BUT U GUNA SPEND A LOT OF TIME ON FILLING IS IT TRULY WORTH ALL YOUR SPAIR TIME? OF COURSE IT IS IF THATS WHAT U GOT TO WORK WITH. FOR MY TIME 3600 PSI 4.3CFM IS ACEPTABLE FILL TIME BULK FILLING A PAIR OF 110CF SCUBAS A PRESURE SWITCH CUT OFF MANDATORY I PIDDLE OOPS FORGOT THE COMPRESSOS RUNNING LOL . DO AS I SAY NOT AS I DO REMEMBER 2AM SHOOTING IN THE SHOP IN TOWN.