The Smith Quickbraze torch handle does not really work well for brazing bicycle frames. Many years ago (before online advice was available) - after looking at its pretty picture in the Smith catalog - I ordered one and it was a waste of money. I finally gave it to one of my friends that could use it for making jewelry. The length of the tips are too short to keep the light body from overheating when doing a lug braze or brass joint. You can kinda do braze-ons with it but not better than with the Smith torch handle you really want - the AW1A. Other good options are the Victor J-28 or Harris 15-3. These lighter "aircraft" style of torch handles allow more freedom and precision of hand movement than their bigger brothers (that are designed for use with cutting attachments). Students sometimes bring their own torch handles to class but will never use a heavier one again after trying an aircraft style of torch combined with Kevlar hoses.