The only thing I do different than Evan, if the post is too long rather than stab it I go in from the treble hole and push with the slotted part of the setter. I avoid stabbing it too many times. Definitely works for me. If I need to rotate the post then I'll sometimes use the scissor setter, but it's easier to just remove the post and reset it. I also put a small alignment mark on the bottom center of the post as a reference point. I can tell by the mark if the post is suituated correctly or needs to be rotated. The final fit is looking through the endpin hole and using a mirror through the soundholes. My favorite necessary tools for setting a post is Doug's luthier light and a magnifying visor.