Posted by:
Rolly (---.hsd1.ma.comcast.net)
I do hope after you had the heads welded on you had the boiler stress relived.
Unless the tube holes are reamed to the same taper as the swedgeing tool you should be using a tube roller.
They work great with a battery-powered drill that has an adjustable clutch on it.
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www.tcwilson.com]
Rolly
My tools