odd that the leak stops when you increase pressure, usually the other way around. Check your manual but if memory serves you wind the adjustment all the way in and then "I think" you wind back out again 5 full turns to set the pressure to standard, check the manual, I'm sure it tells you. If you have to go more than 5 turns (or whatever the manual says) then something is wrong and I would start by replacing the o-rings in the LPR, not a major job or get someone at the field who has done it before to help. OR, get it back to Dye, being a DM9 I'm pretty sure they will help, give them a call and see what they say. You can damage your marker if you over-presure, so may be worth the few quid to ship to a specialist.