me to
I had almost the same thing happen to me. I drilled the seatpost because I thought I needed to. Turns out that It would have worked anyway.
Later, after about fifty miles it looked like somebody took a hacksaw to my seatpost.
I just got finnished first, welding the seam of the brake with brass, filing it flush and then wrapping the seam with a steel "collar" and then brazing it together with siver.
Since my new engine has mounts that work with a bigger down tube I found some thin plate and patched the holes I made in the down tube. I then did some fillet work around the plates so the mounts would rest flat on the tube.
Not only that but I only burned myself once.
I hope that it will hold together for awhile. I will let you folks know when and if it fails.
As for J.B. weld why not use super glue? it seems just as applicable. Instead of J.B. think fiberglass. Wrap the tube with about five layers with epoxy between each layer. Let set for awhile and have at it. Just a thought.
Mike-working my fingers to the bone,only to get-
bony fingers-Frye A.K.A. Frye bikes