Your draw length shouldn’t change, just because you start using a fixed crawl. If the fixed crawl causes you to have to draw more to get to the clicker, then that means you should adjust the clicker. I have an old arrow with a washer between the point and the shaft which is exactly at my draw length. I draw it occasionally to keep me honest, or to measure the draw weight of a bow at my exact draw length. Figure out what your draw length should be, and make one of these for yourself. Then if you do something that changes how much you have to draw to make the clicker go off, you know what you have to adjust.