I bought a century U-fix, and was pretty lucky on the other one, but this one is short stroking the hammer, in SA it functions normally, but in DA the hammer falls about 1/4 to 1/2 the trigger pull, if the trigger bar is held up, you get a full stroke, it seems that the sear is slipping before the hammer is fully back.
I know of the dreaded safety/sear spring problem, but wanted an experts advice before I take the whole thing apart,
as the safety/hammer block is under tension, so I would think the sear would be too.