I started the notion of using knot stops as a means of engaging a release arm for a tip-up like apparatus that works with the users own rod and reel combo.
one good way to keep them from slipping is floss. the kind that is flat more so than round. run a short length through the stop / straw before removing the straw and tightening the stop. do this at the general depth you will be fishing. Trim the floss short but leave the tag ends long enough to re cinch with plyers. Don’t over tighten when you set them initially or you’ll never move it again.
they can hang up. the best I can say is to be aware of where it is throughout the process of landing your fish, and time your (pull up reel down) pumps accordingly, watching out for those two spots. Rod tip and bail.
there is a third bad spot during late ice. as the ice is on the way out is has cracks or cone ice. The line can wander into those cracks if a fish makes a run sideways. I know from bad experience.
We’re a bunch of gamblers. Tight lines..