I suggest getting rid of all the lead as soon as possible; and be sure
to wear a dust mask.  Cut the lead in the middle, and then figure out
the best way to remove it from behind the tracker bar, and do it dozens
of times.  Then figure out the best way to remove the lead from the
nipples on the end, and do that dozens of times.

A great tip I got from Paul Manganaro is to use a hot-melt plastic glue
gun to melt blobs that will hold the new rubber tubing in place.

Randolph Herr