Re: Tinsmith's in frame gas tank for cantilever Schwinn.
You could well be right about the female threaded bung soldered from the outside being better. I don't know. Part of what is driving this version is economy. I just picked up a brass hose coupling from Lowe's for the next tank and it was less than four dollars. The brass cap was less than two dollars. My thought is that if there is a weak point subject to vibration stress it would be at the mounting points. On this tank #1 it fits the 51 frame so snugly that the little vibration coming from the four stroke is hopefully not going to be a problem. I guess I'll find out. I figure for the smaller tank #2 that shimming it snug with rubber pads or harness leather should keep vibration down. But there is always room for improvement.
Yes, that's what Dan called the cutting machine,: a shear. Cuts like a guillotine. I wouldn't want to get a finger in the way...
Someday when I grow up I will probably lose interest in toys with wheels, but until then...