"I cringe at using split-shot as I hate to weaken my line like that."
I used to think this too. But it's NOT true and if pinched on correctly they wil not crimp/damage/weaken your line on bit. This is how I was shown to do it and the odd time I use split shot it works for me:
-Get a pair of pliers that is not flat like regular needle nose, but has an space/opening in the middle of the jaws (like a leatherman, etc).
-Take your split shot and align your line as close to the MIDDLE of the shot as possible, NOT all the way into the back of the opening (they will slide if you do this).
-Pinch the shot on lightly using your fingers or the tip of the pliers. Don't clamp down yet.
- Now...place the shot into the round opening part of your pliers and squeeze down around the entire shot to compress it with even pressure spread around the shot. If the line is in or near the middle and your squeeze the shot this way it will stay tight on your line, not crush the line, and not crush the shot flat either.
***If you just squeeze it on with the tips of your needle nose pliers it will likely slide around on your line. Same if the line is at the back of the gap...try to keep the line in the middle of the shot***
In the event my explaination sucks imagine trying to squeeze an orange with both hands cupped around the orange. That's how you want to squeeze your shot.