RE: Can you Tape Mechanical to make practice tips?
I bought some (not out of the pakage yet) that came with some shrink tubes for just that purpose, slide it over and hit it with a heat gun and you're good to go. Just make sure you don't get the weatherproof shrink tubes (for automotive/submersible pumps), they are lined with a goop that melts when heated, then hardens, you don't want that on your expandables.