I don't know if it is relevant, but I thought I'd throw it out there.
Having experienced both L&R and Davis triggers, I'd take the L&R as a better platform for customization. Following Ken's tutorial, I think you could use everything but the trigger blades, i.e. the plate, the springs, screws if desired, and so on. I am using a DST 6 right now -- it was leftover in my parts box. For a target rifle, I thought it will be fine, I'll just shorten the plate and triggers. Well, the plate had a void right where I cut it (that's fine, I'll either ignore it or weld it), so if I had tried to bend it, it would have broken. Add to that the reason I didn't use them in the first place: the triggers are made of what appears to be ultra-hard air-hardening steel. Very difficult to file or cut, and must be red hot to do any shaping. You cannot simply anneal -- it takes a fairly involved process.
The only advantage I am aware of with the Davis triggers is that they require slightly less wood removal than the L&R's, due to the springs (wire) used. The L&R's use pretty old-school flat springs, but that would be more appropriate in most cases, anyway.