Just got the Impact MK2 after 8 weeks of wait, It came with gauge showing zero, didn't think of anything abnormal, Filled it to 220 bar, shot through 1 magazine to zero it in, it was amazing accurate. I was very happy, then put it away. Two days later, took it out to try out a bi-pod, noticed the pressure gauge only shown around 120 bar, I was kind of puzzled. Then I filled it backup to 230 bar, again, put it away. One week later, took it out to check on it, the gauge only shown about 110 bar. I tried soapy water around the obvious parts, gauge, bottle connection, no sign of leak. Now, I filled it back to 150 bar, see what happen in couple days. Any ideal what part should I look for or check? I only got the Impact about two weeks.