I put a Davis DASST on my last build, a Lehigh. It was quite problematic to deal with. The holes in the 3 moving pieces were larger than the pin diameter, so it was rather rattly, and I hate rattly triggers. I solved for this by using a wire drill bit slightly larger than the 3 pieces, (trigger, unset blade, and set blade) and re-drilling. When done, I busted off the shank of the drill bit and used that as my hinge pin. Most of the rattle is gone now.
The general problems with this unit though are several fold; The unit itself is pretty beefy, and large. If you want to inlet it to create a slim LR you have to bend your sear arm upwards to facilitate it. You also need to do a lot of filing of the base of it, and perhaps heat and bend it to get it to follow your wrist profile. And, the forward swing of the trigger to set it tends to swing down. That necessitates a rather rounded bow in the TG, which may or may not be acceptable to the style of build you are doing. Shooting performance wise it's ok though. The trigger breaks unset right around 3 pounds, and set right around 3 oz. You can install or choose not to install the adjustment screw if you want, but if you leave it off, there will be a little creep in the set trigger pull.
All in all though, I didn't think the installation was really worth all the mickey mousing around with it it took to make it work. Would I put in another DASST? Yeah. But I'd look around for one that was much better thought out and made than this Davis one was though.
I will post pics of the build later. I finished it a couple of weeks ago, and the very FIRST day I had it at the range it slipped off the bench and busted off the toe plate. Didn't notice it until I got home, so the TP itself is also lost. I was heart broken. So, I have to do a wood splice and make and engrave another TP. Another week or so of work. Aaargh!
