Pilotting with a QEV?

[Tipsypyro]

I know ahead of time that this is probably a dumb question, but I have been raking through the archived posts for the last few nights hoping to find what I need and it may just be that I am getting kinda dense.
I built a 2.5" launcher with a 2" Galcon diaphragm valve and used a 3/4" Orbit sprinkler valve to trigger it. It works awesome but after a while the weight of this thing hanging off the side and a couple bumps on door frames developed a leak on the threads into the lid of the Galcon. I also had a small coaxial I needed to pilot faster so I bought 2 0.5" QEVs online. The little black box valves with no spring or anything. For some reason, I can't seem to wrap my head around a way to use them the same way as the sprinkler. Do I need to vent the piston and add a spring on the pilot port? I know it's probably right in front of me and if so, I apologize for wasting the space.

[jackssmirkingrevenge]

The QEV should have three ports labelled R, A and P

R - barrel, A - chamber and P - pilot

[Tipsypyro]

Yes, it does. My question is how do I equalize the pilot area?
Ok, I got it working by drilling the piston and putting in a spring. I will post some aftermath as soon as it warms up a little.