I keep a spool of plumber’s solder on board for quick weight replacements. Snip a segment with the desired weight, and insert it into the weight pocket of soft plastics. If your favorite lure does not have a pocket, create one by inserting a hot ice pick. The solder can also substitute for split-shot weights by crimping a segment around the line. You can leave it loose if you want it to slide freely. The spool is easy to locate in the tackle box, and the amount of weight can be quickly adjusted to fishing conditions.