I tie flies (try to tie). I wrap the bobber to the end of the rod and add some "head cement". I have rods that are 10 years old and look like I wrapped them yesterday. If I want to take the spring bobber off, just take a razor to the thread. No damage to the rod at all.
Yup! I do the same or make them out out guitar string or music wire and a chartreuse bead works best for me to see.