RTI Mora .357 issues

That screw in front is to adjust the position of the trigger. If you want to make the first stage longer or shorter, you need to screw in or out the trigger connecting rod.
According to the diagram on the website that is to adjust the trigger travel of first stage which in my mind travel how you lengthen the pull or make the trigger longer or shorter as you stated. There is nothing in the manual about adjusting the connecting rod I only found that after my entire linkage came apart because the little tiny rod that it connects too somehow fell out and it took a magnifying glass and tweezers to get it back in
 
Yes, you are right, we need to expand that part in the manual. You can adjust the travel with that screw, but you will also change the "starting" position of the trigger. If you want to keep the location of the trigger while changing the 1st stage, you have to adjust the connecting rod. If you take off the right cover plate it should be easier to understand what is happening when you adjust those things.
 
I have a new Mora in 25 cal which I purchased from Talon. Two questions. My shroud, at the rearmost end, is fitted to the clamping collet with four screws to secure it to the barrel. I have read the technique to put the shroud into compression but this end piece has two O-rings &, as I tighten the other end cap, the second O-ring gets squeezed out from the shroud. I don’t know what purpose the second O-ring serves but it is preventing much compression being applied to tension the barrel. The second question is the dwell adj w/the perforated holes. Is the adj procedure to loosen the large, thin locking nut, then turn the perforated tube or do I insert a hex wrench to turn the internal screw inside the perforated tube which seems to turn freely at the moment?