I have these torches,
- MAPP (which I use for annealing and double sided sweating),
- A standard welder’s oxy/acetylene torch which can be outfitted with various tips of sizes and configurations which I use for large brazing projects, (good for steel welding too which I am terrible at)
- A regular acetylene torch outfitted with various tips which is great for most all soldering, and a
- a Smith Little Torch, an oxy/acetylene setup, which also can be modified with various tips. It can be very powerful and concentrated so that it is focused to very small areas without cooking the entire piece. This what I would use to melt those edges on copper.
If you do purchase the oxy/acetylene tanks and regulators you can use them interchangeably with last three setups. Oxygen and acetylene and equipment
are readily available from local welders/gas suppliers.