Originally Posted by
unterhausen
if you do try to use heat to remove the stops, just heat up the stops. You don't need to heat the tubes. This is the secret with any task like that, dropouts for example. The brazing filler will let loose, and then you can clean the tube with a file.
Position the frame so the piece you're removing can drop off on its own when the braze melts. A bucket of water below the piece will catch it safely. A couple swipes with a wire brush will remove almost all of the molten braze from the tube.