FX Huma 1st reg on m3

I have a "problem" that I cant adjust my 1st reg (its always bottle preassure or very low)
I tried 2 fx regs and its the same, I have read someplace here that the m3 bottle valve has a sleave or is bigger than other fx bottle valves?
And I use my crown mk2 bottle on the m3 so I think that has something to do with it not opening the valve enough if I dont turn the adjuster screw all the way out giving it max preassure.

Does this also apply to the huma 1st reg or where can I buy this sleave to put on?
I also could just buy a New 580cc bottle with m3 valve and hope that solves it, but its a bit more costy
 
Hmmm....
Ok, let me get this straight..
You have changed out the FX reg to a new one..... Also changed to a Huma Reg..(which I run, 1st and 2nd reg)
Have you checked the bottom of the hole where the 1st Reg screw in??
Remember, since you can back-fill the bottle on the gun...
There is a passage on the reg to allow fill pressure to bypass the Reg!
M3-1st%20reg%20Oring.jpg

It is that hole on side of the reg.
So to isolated the Fill/bottle pressure is that Bottom O-ring!!
Check to see if there is any crude or scratches on the of the Hole...This where the Reg seal against!!

Good Luck