it has been a problem for some time, but on a post, tim, said he guarantees his work for a 1 year period. the disco i bought from pyramid, had some issues from the start, such as losing pressure from the gun when bleeding the fill hose. also if pumped up and left over night, it would leak down from 25 to 50%. when the pressure was shot down and reached 1200 psi, i would feel a poof of air on my face. that rose to 1500 and the poof got a lot worse. so far i have had no problem with the disco i purchased from mac1, or the one i sent to them for repair and tune. i am very happy with the mac1 discos, they both shoot very well, and i am having a good time finding what pellets they shoot best. john
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