I just got my 98 Custom off of e-Bay today, and I am trying to install the Cyclone Feeding System which I have had for a couple days. In the directions it said to take the gun apart, and I am on the step of removing the stock valve to replace it with the Cyclone one. I got one of the screws out just fine, but the other one, the one closest to the back of the gun, is completely stuck. I have already stripped 2 Alen wrenches trying to get it out, had a friend hold it down while I pulled as hard as I could on it, and I ended up bending the wrench. Has anyone ever had this problem before? How can I get the screw out without breaking the gun?