
If this is the trigger you're talking about, the issue of over-travel would be rather simple to remedy. You could add a block inside of the trigger assembly that would prevent the linkage from moving beyond a certain point. Also, you could get a crisper trigger out of it by replacing the trigger linkage with one milled with the trigger pin hole forward of it's normal position. The crispest trigger you're going to get though, would be an electronic one, though you'd have to design an entire firearm around it...