I have two pistols that have way too much take up. By this I mean there is about 1/8 to 3/16" travel before the back of the trigger bow engages the sear. In the past I would have soldered a shim on the bow and it would be done. Instead, I picked up a couple of Nowlan triggers with the take up tab.
Now for the embarrassing question. How in the heck do you use the tabs? From the looks of them, two wings below the bow below the shoe, one would pull them apart to reduce the take up. What do these tabs engage? How the heck do these work? And no, there were no instructions with the triggers.
That area of the trigger bow where the wings are is what stops the forward travel of the trigger when in the frame. When bending the wings out or forward you are allowing the extended wings to make contact with the frame before the trigger bow normally would, therefore limiting takeup.
Good luck, I really like Nowlins trigger, its a good unit.