I've always been toe shift only, because the heel shift always seemed to get in the way. The splines on the tranny shaft go south from hard shifting, and because the tiny amount of slop when it starts to get loose is easy to miss. This I learned from an 82 FLT which was the first bagger I had back in my 20s.
I also learned that a hair tie makes a great road side fix (figure 8 loop it from the arm to the shaft) when one of the ends comes apart. I once had to ride it that way for a month back when I was "young and on a budget" it never fell off once.
Scarlet Red 2010 Road Glide Custom named Trixie - She's a flashy little minx..
Basic black 1981 Tour Glide Classic named Alice - She's a sleeper project.