Seeing my hunting guns are used only for hunting, I don't install DSTs ,...in fact I don't like DSTs....they're a complication I don't want to deal w/.
But if a MLer I'm building requires one, then I block out the rear trigger and tune the front trigger to a 3lb pull....could go less, but 3 lbs works well .The block plate can be removed and then the DSTs can be used.
Awhile back went elk hunting in CO and our camp was at 10,200 ft elevation and my Hawken had the rear trigger blocked and a month before the hunt, asked my buddy if he wanted his rear trigger blocked and a 3 lb pull on his front trigger installed. He said no.
Well, he was climbing a steep slope and halfway up saw a 6x6 bull so pulled the rear trigger back and was bringing the rifle up and touched the front trigger and it fired....missing the elk. To his amazement, the bull just stood there so he reloaded and repeated the cocking of the rear trigger and again prematurely touched the front trigger and missed the elk which then took off. He attributes the "screw up" to heavy breathing and excitement.
Needles to say when home, he asked me to block the rear trigger, etc. and 2 yrs later got a nice bull.
If DSTs are preferred by some, so be it seeing they are probably better for target shooting....FRed