First carefully disassemble the marker. Take the shell off of the body and take this opportunity to clean and lube the bolt.
From here there a couple ways to do the mod.
1. cut the shell to allow for the QEV to be installed after the shell is in place.
2. Cut the shell so that it can be installed and removed without the QEV being removed. (this is my favorite, so we will focus on this one.)
Hobbydad came up with this and supplied the photos for me to use. (Total genius!)
As far as the cutting goes, I used a Dremel with a diamond cut off wheel attached. You could probably use almost any type of cut off wheel Dremel makes, but the diamond wheel is very thin, and it removes very little material. I'm positive that you could NOT cut it by hand with any type of knife/blade, without totally hacking it up. The body is thicker and heavier duty than most think.
When cutting, start at the original rectangular opening (where the banjo fitting you just removed would normally sit). Make 2 small angled cuts outward from the front corners of that rectangle, to about a 1/16" of an inch from the body line. Then simply follow the body line to the front of the body in 2 straight lines. Remember to stay about 1/16" in from the body line on these straight cuts as well. That's it, your done. Just remember to take your time, you don't want to hack anything up. If it's done right, it's almost impossible to detect the mod from outside of the gun. Hope that helps a little.
With the shell off cut a section out as shown in this picture.
Next install the QEV using lock-tight or Teflon tape. (Use blue lock-tight not red) If Teflon is used, be very careful to apply so that as you screw the fitting on it is not unraveling the tape. Also be sure not to block any of the port with the tape.
DO NOT OVER TIGHTEN THE QEV!!!
These are brass fittings and will snap. There is no reason to ever tighten these more than finger tight. The lock-tight or Teflon are recommended so that you can leave the QEV facing the correct way and still be loose. Its not going any where, do not try to force it.
For my install I choose to not use the supplied or standard barb fitting. I have had experience with them in the past, and did not want to deal with replacing the pneumatic line. This fitting is 100% optional. More cutting is required for clearance of the shell.
Now to re-assemble. Connect the pneumatic line the barb or QD (Quick disconnect fitting that I use) (some line may need to be trimmed. Take you time here. Make sure there are no kinks.)
Install the grip frame and insert the back screw and start the screw but leave loose.
Now insert the removed piece of shell in front of reg and under barrel.
Line up holes and insert screws. Try to tighten them all a little at a time to ensure none bind up. (as soon as one starts to get snug, move to the next until they are all tight.)
[Pic removed to conform to rules.]
Finished product from the front.
The other method would be to simply cut holes in the body to allow for the QEV to be installed. The down side is that it will have to be removed to remove the shell. This way you can simply remove the shell and leave the QEV installed.
If lock-tight was used. Let the marker sit for 24 hours to allow it to cure. It may even be a good idea to install the QEV, wait 24 hours, then assemble the marker.
If Teflon was used. It should be ready for action!
This is how to prepare the QEV for the install.
First, take a small pice of teflon tape.
Next install the tape on the QEV and ensure that no tape is blocking the inlet hole.
Install the QEV onto the body ( the brass fitting is a Quick disconect. 100% optional, will not affect performance, but will allow for removing the board many more times with out needing to replace the hose.)
Slide shell on
Install banjo fittings and attach board.
Attach trigger frame