A simple tip about keeping them tight is to put string wax on the threads before you tighten either the broadhead or field point on. It takes the slack out, gives you something to tighten evenly against, and allows you to get them off after being soaked and left on for a few months. Hand tight is plenty tight unless you need to try to get a broadhead to spin true; sometimes an extra little bit of tightening will bring them into alignment, and that's when I use the broadhead wrench.