great job fx nice to see the support on this forumHi Kiteboardkid,
After discussing your situation with the technicians, please contact our customer service.
Regards,
FX Airguns USA
Had exactly same behaviour. Just my 1st reg was set to 180. And that is more than it is allowed according to manual (170).
I rebuilt the 1st reg with new piston, and set the 1st reg to 170 and now it stays constant.
My question would be what to do with 1st reg if you want to shoot slugs, having 2nd reg at 150-160?
Leave 1st reg at 170 max or is there an upgrade for the 1st reg holding more than 170 bar?