"Lightening mainsprings in either Redhawk can end up in misfires, that's why Bowen replaces the factory firing pins with his extended pins. "
You are quite correct at least for the RH. I have been through 4 of them with 4 different
gunsmiths. The lightest mainspring of Wolff to work reliably in double action was the 14 pound. Interestingly enough, the double action pull came out about 10.5 which is in the range Clements and Bowen claim. The last also had the Bowen firing pin, minimal endshake and 0.063" headspace. The single action came out about 4.2 or so pounds. I recall contacting Magnaport (who did not do any of the 4) and being certain they would set single at 3.5 pounds. Perhaps the sear angle is changed.
It would be interesting to see what Ruger did to get the double action down around 8.8 or 9 or so pounds. I see Jeff Quinn in the writeup of the new .327 SP-101 had one with a double action of about 9.375 pounds when they used to come out of the factory (SPs) at about 14. Somewhere I recall reading Ruger was going work on getting better trigger pulls in their revolvers about a year ago. That might be an interesting article for a gun mag.