Just finished my first project since I retired 2 years ago. It's a Jerry Howell plan for a Super Stirling Cycle Fan. I didn't know if I had the equipment to do it but I did. It was fun building it and more thrilling when it actually ran yesterday. I ran into some glitches ,but I over came them with some creative thinking. I would like to know what kind of solder was used on the flame guard. My solder melted with the small flame recommended by the directions. I used both rosin core and plain plumbing solder and both melted. Next is trying low heat silver solder or divising a way to bolt the guard together with tiny screws.