Details like that are seldom seen here in the states so you can't blame him for soldering. The resources are either difficult to come by or are in foreign languages. This is the best reference I've come up with and we've had to fill in the blanks: ruclips.net/video/w7lAFq7j3qg/видео.html
Clean work
How do you form the tube? What do you use to bend the metal?
why not just make a double seam?
Details like that are seldom seen here in the states so you can't blame him for soldering. The resources are either difficult to come by or are in foreign languages. This is the best reference I've come up with and we've had to fill in the blanks: ruclips.net/video/w7lAFq7j3qg/видео.html
Not enough video
Looks familiar
Gör om gör rätt