I've done the power adjuster thing. Not much to it, you need the screw and a spring guide. The degasser passes through the spring to the hammer, and pushes the hammer in against the valve stem to open it. The 10/32 screw will fit through the spring no problem, that's why you need to make a spring guide for a power adjuster. I think I used a 1 1/2" (?) 10/32 brass thumbscrew that I found in my parts box and I made the guide from a nylon bolt from Home Depot. Turned it down with a drill and dremel. I've tried a bunch of different springs, ended up cutting down the original about 1/4". There isn't much clearance when the gun is cocked, the spring is almost fully compressed already. I recall less than 1/4" of play and some of that is lost to the spring guide, thus the need for a shorter or a lighter (thinner wire) spring.
I also put in an HDD from Big Ed (good investment, I count about 20% shot increase).
Out of the box, mine was shooting right around 800fps with Crosman 14,3's. Mine is an early serial number, I understand the newer guns have been somewhat improved. Tested last night, .22 shooting 14.3 Crosman's: on low, from 2000 to 900psi, started out in 550's, topped at 705, I stopped at 650's after 99 shots! On high, from 2000 - 1100psi, pretty flat 850 - 860 for 17 shots, then a quick drop to 800 in ten more shots. Also, the gun is VERY quiet on low power, especially below 650 fps. Sounds like a .22 CB on high.
Personally, I'm happy with the results but it took a lot of fooling around with guides and springs to get a decent result. Had the gun apart dozens of times over many hours. I think if I get another Disco I'll just buy an adjuster.
jeff124
