JT Excellarator 3.5.
I took apart 2 markers JT Excellator 3.5., installed new o-rings, except for possibly an o-ring on the striker. I took one gun to a paintball to test it with HPA and noticed it spuddered and would not re-cock. I'm new at this hobby however hot shot markers. My guess is that the marker needs a new o-ring on the striker and maybe some polishing and oil based a thread by used condom(former name of member). PB store wants $25.00 to diagnose/fix problem. I have two of these markers and need to know where I can buy inexpensive HPA tanks.