Need help degassing my Wildcat MK3

I’m trying to apply a carbon fiber wrap on my Wildcat MK3 and I’m having a difficult time degassing the gun so that I can apply the wrap to the air cylinder. When I pull off the dust cover, the gauge at the front of the gun is attached via a super thin brass nut, but no wrench in my toolbox seems thin enough to be able to grab onto it. I even went to Home Depot and bought a thin wrench set to help me accomplish the task, but they still weren’t thin enough.

I watched Ernest Rowe‘s video on YouTube demonstrating how to disassemble (and degas) the Wildcat MK3, and he simply pulled out of wrench and loosened it right up and made it look like a piece of cake... but alas, I’m stuck.

Anyone have any suggestions on how best to go about this? Am I missing something?
 
Degas the MK 3 BY Loosening the regulator gage slowly.

I tried to do that but after I made 3 full turns opening there was still no air “ sissing” and ai did not dare to loosen more. i decided to go for the airgauge afterwards that started sissing after a slight turn . Should I just continue loosening the regulator gauge without any risks till air escapes ?
 
Degas the MK 3 BY Loosening the regulator gage slowly.

I tried to do that but after I made 3 full turns opening there was still no air “ sissing” and ai did not dare to loosen more. i decided to go for the airgauge afterwards that started sissing after a slight turn . Should I just continue loosening the regulator gauge without any risks till air escapes ?



Try threading the gage back in a little. On mine it took about 4 turns to start leaking air then it stopped. So i loosened the gage some more, and it leaked a little then stopped. I started to thread the gage back in, afraid to unthread any farther and it started leaking more air at a faster rate till it blead the air cylinder. Their should be a better way to degas the MK 3 but I am unaware of one. 
 
Degas the MK 3 BY Loosening the regulator gage slowly.

I tried to do that but after I made 3 full turns opening there was still no air “ sissing” and ai did not dare to loosen more. i decided to go for the airgauge afterwards that started sissing after a slight turn . Should I just continue loosening the regulator gauge without any risks till air escapes ?

Never loosen a guage with a X-ring on mk3 X-ring will seal till you blow the guage off, the tube guage has delrin seal will leak as soon you loosen guage.



Ernest