Originally Posted by
williamskg6
Well, the new ferrule and the small tube are both metal. The vinyl end cap part I mention is only to keep the metal parts somewhat centered in the frame's fitting. It's not perfect, but an improvement.
Given the angle of the ferrule, you are putting strain on the plastic part of the ferrule. The plastic part is the only thing that is really engaging in the stop. The plastic is going to cause a kink on the inner cable as pressure is put on the cable.
A step ferrule will keep the cable housing in a straight line. Your current workaround will bend and put pressure on the cable which will have an effect on the precision needed for index shifting.