I understand your problem all to well....
I've had 2 of them, a Crosman Vaporizer np2 and a Benjamin Trial BTN2Q2WX, both 22. The Vaporizer trigger was absolutely horrible. A gritty long hard pull that was anything but a clean break trigger. The nutters were laughing at me. 1 nutter about 20 yards downrange went over and dug up my pellet after it buried itself inches off the mark in the dirt. A looong pull unpredictable gritty heavy trigger and accuracy is out the window. Ya, that adjustment screw only adjusts the first 3' of stage1 trigger pull, useless, stage 2 is the problem, and the way the sears are set up, gritty is the flavor of the day in np2 land. Good luck, I couldn't fix it and tried for months. I will say that Crosman customer service was excellent and tried to help me, but no way to over come that CBT abortion. Its to bad the rest of the gun is good.
The nice wood stock np2 Trial trigger was better, even though it was more or less the same np2 engine/trigger. Tried numerous store bought trigger kits on the Vaporizer,
maybe a little better. Also tried my own longer adjustment screw and (many) springs with polishing the sears perfectly, lube where it should be, washers, etc, still terrible,. Maybe I just got a bad one, idk.The Trial np2 was better but the trigger was not good stock or with any trigger kit I tried. No adjustment, or different spring, screw, anything, nothing really helped much. But the Trial np2 trigger was much better then the vaporizer out of the box. Maybe I missed the right kit or instructions to fix it, idk. But do know even my sons $100 np prowler 22 has a much more shootable out of the box trigger then the np2, and thats not saying much for the prowler. Don't let the new Elite np2 confuse you, its the same as the np2 its just whatever marketing decides to call their new rifles at the time. My Vaporizer was the Elite np2 and the Trial just called NP2, but same thing.
Please let me know if you find a substantial fix for the np2 trigger...
Maybe I'm just use to the mrod excellent trigger that out of the box with no adjustment is superb imo. Just came in from backyard pest control, here is a earlier pic of a rat at my backyard squirrel tree, dispatched by my smooth very light stock trigger Mrod at 52yards @985fps muzzle, with cheap 14.3 crosman premier mag domes, thats all a rat deserves is a cheap pellet,,, lol. IF you haven't already, got to try a Crosman/Benjy Mrod, you'll love it.