I am about to remove a failed Lowrance LGC2000 antenna. Hope to salvage the mounting screws, as the new LGC3000 doesnt have mounting hardware. I would rather have new screws and have them ready when I start replacement. Problem is I cant find screws to fit. Ive checked 10-24, 10-32, 8-32, and 6-32. None fit, must be their special threads? Anybody know?