Re: rear shock compression adjuster screw
Sounds like its time to toss the rear shock. Ive mesed about with the shock on mine and wouldnt say it handles like its on rails. Ive got mine currently set as per sports rider, and I dont really see much difference to the standard settings. It still wollows about, and refuses to hold a predictable line, nor does it give much feedback. Prolly the best thing i did was to drop my forks down by about 3-4mm.
As for the screw adjuster....cant say. Sounds like perhaps something internal is jamming it.
Poking the Devil with a stick then running away