I am building a singlespeed from an old Giant hybrid bike, the cable guides on the top of the top tube are these ugly chunky triple beasts, I want to lose them but am afraid to trash the frame. Filing them off is not so hot since they are big buggers, it will take forever, and one slip of the file... and no, I don't have a Dremel and don't plan to buy one. They cost more than a new bike here in Oz.
Can I use heat? It looks like they are either brazed or soldered on.