OK... So I think I figured out from my previous RT Pro valve thread, that a piece of teflon tape had gotten into the gun and caused a leak down the barrel. I ordered a eBay rebuild kit to take care of the old yellowed o-rings. (http://www.ebay.com/itm/200905686126...T0%26ga4m%3DT3)

So now, when I reassembled the RT Pro valve, I get a leak out of the small hole on the left hand side.

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It does fire, but the leak is consistent and strong. I rebuilt the regulator pin valve again, but I'm not sure if it's sitting all the way in the bore in the valve.

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I'm frustrated, and I've got a Level 10 kit on the way, but I want the valve itself sorted out first.

What am I missing?