Try turning the screw just a little bit and then backing off. Turn a little more, back off, etc. Or, you can hold the tab of the t-strip flat against a block of scrap wood and drill it carefully with drill press, using a bit only slightly bigger than the hole. You can do it with a hand drill too, but quite often the drill bit grabs the terminal and spins it out of the pliers or whatever you are using to hold it, resulting in a bent or busted strip.