LVL 10 Users,
I have read all the posts for residual pressure and the results make sense.
The bolt acts like a cork holding back pressure in a bottle. When you fire the marker the air pressure pushes out the "cork" BUT the mainspring is now holding the cork in with more force than before. This results in more residual pressure in the system.
In other words the fact that the LVL10 mod causes your gun to stop shooting abruptly at the end of the tank and the gun holds more residual pressure is the result of the same thing. This is all caused by the stronger mainspring.
My personal opinion is that removing a macro line from a fitting is a poor choice to degass a gun. I would recomend everyone use some type of degassing fitting to loose all the pressure before dissasembly. Most people with screw in tanks will not have a problem. The others will just have to get a degassing fitting because this effect is a normal part of the LVL 10 operation.
We didn't see it here because we use degassers on our lines. Overall I see this as the only hiccup so far in the LVL 10 testing.
I should warn everyone that the Retro Valve and RT Valve will hold residual pressure even with the air source removed. You should NEVER remove your valve and mainbody together and then pull out the valve. This can cause the on/off assembly to shoot out at high speed. By removing the valve while the mainbody is still attached to the rail the system will degass properly. This is the best reason to NOT ADJUST YOUR TRIGGER ROD!!
Besides this I don't have any other solutions to the residual pressure problem. You just can't shoot it down to nothing with this new setup.