Hi Max,
this is the torch I bought
https://www.ebay.com.au/itm/353834344274 but the thread into the bottle is wrong so I had to turn up a spacer to enable it to seal up. I notified the seller and told them they should remove them from sale until the get the correct nut fitted. Out of the blue yesterday they refunded the money and asked if I would be able to send them a correct nut so their supplier could manufacture them . The torch works really well and it has a very controlled flame that might even be hot enough to silver solder with. When I get a chance I will give it a try on some copper and see how it goes
