What is the diameter of you rubber tip?
This would be my answer to tapered tip. I would use a piece of 19mm Id brass or copper tubing the length of the ferrel. Tap it down to the wood at the top of ferrel and pinning it in place Then fill the area around the ferrel with epoxy. This would let me use aThe current rubber tip is 1.4 cm-14 mm
The cane diameter at approximately where the top of the ferrule could be is 1.9 cm-19mm ( Assuming the ferrule is 4.5 cm high which many seem to be). I do not yet have the ferrule.
I appreciate any input.