Well I just got trigger return springs in today so I have experimented a little.
Bending the spring so that there is almost no preload left I still wound up with a 6.5 lb. trigger.
I did some experimenting, there are several things that add to the trigger weight on the Scorpion.
I completely removed the trigger return spring and reset by hand and just the hammer and FPB lifter assembly measured at 3 lbs. for a release
of the hammer. This was measured with the trigger control group out of the gun which turns out to be significant (more on that later)
With the modified trigger return spring and the hammer dropped the trigger weight now measured 4 to 4.5 lbs. for just the spring, about a lb. less than previously.
Now with the lighter trigger return spring in, the hammer engaged, and the trigger group out of the gun, It measured 6.0 lbs. consistently.
Returning the trigger group to the gun, I was at first surprised by the weight now being 6.5 lbs time after time.
Then it dawned on me, Firing Pin Block. So if everything is measuring correctly we have .5 lbs of trigger weight just to release the FPB.
With the modified spring and the polish job the trigger is smoother and obviously lighter than my original 9 lb. pulls.
The trigger has a very slight 2 stage trigger feel now, the second stage feel comes from the disconnect hitting the hammer as the sear moves forward.
Still a VERY long travel..
All in all a substantial improvement but still no where near as nice as what I tried at CZ Custom, so I am looking forward to seeing what they and CGW comes to market with.