Reply To: Advice wanted for repairing Marauder air leak
And the solution to cut o-rings is to GENTLY take a rat tail jewelers file to the inside edges of the holes in the airtube and chamfer them. It only takes rounding the edge a tiny bit to stop cutting rings if you push the valve in til the o-ring is starting to get caught and use a flat blade screwdriver or like tool to ease the ring down into its slot as it passes the back edge of the hole.
I have used a mototool but I have used them for years and know how to hold back and not remove too much. a novice should use the file and take it slow.
I also smooth the inside edge of the hammer pin slots as per videos on youtube to prevent scraping/dragging on the hammer like some out of the box marauders do.
Safety – Remember to THOROUGHLY CLEAN the tube of all shavings before reassembling the airtube and do not use petroleum lubricants inside where pressure is… use some silicone chamber oil.