I built a cheap Airwhip /ankle tickler prop using a 2way solenoid and PVC piping. I rigged it up to a manual trigger. I have a 12 gal compressor feeding it directly into the solenoid. Now here is where I am stuck at, when I activate the solenoid it works at low pressure but too low for the whip effect. As the pressure rises, the solenoid no longer will open. I'm guessing I have a equalizer issue. But what do I need to do to overcome that issue and have it open at a higher pressure?