Okay, after a small delay my "Adjust-A-Pulls" arrived today. Using nothing but what came in the envelopes it only took about 15min per PS90 to install them (going slowly on the kitchen table, didn't want to risk breaking something expensive), installation went smooth w/no problems encountered except those caused by my fumbling fingers. The very complete instructions recommend initially setting it at the middle/3rd setting (appx 5.5lbs) but I wanted just a little lighter so I set mine at the 2nd setting which is appx 4.8lbs (pull selections are appx 4, 4.8, 5.5, 6.3 & 7). After the first install I compared the AAP pull to the 2nd PS90's factory pull. Big difference! I don't have a way to accurately measure the new pull's weight but it's definitely much lighter (I think the 4lb setting may be too light!) and makes the other problems associated w/bullpup linkages much more tolerable, IMHO. I think double taps are going to be much easier to do now. I'm headed to the range this weekend and will post a range report when I've had the chance to test this a bit. So far I'm very impressed w/the ease of installation, actual affect on trigger pull and that it makes no permanent mods to the trigger pack. Stay tuned!...
Tomac