65er, you and I are kindred souls. I refurbished a Raleigh Twenty similarly, back in 1980. I put drop bars on it and a Sturmey Archer 5 speed hub. I got alloy rims with 36 spokes. Boy were they a ***** to build!
You're right, it handled well on rough terrain.
I can't believe I gave that bike away a few years later.
Did you ever see John S Allen's Twenty? He was the one who inspired me to do it. He put cantilever bosses on it but mounted them high. On the bosses, he put on Mafac centerpull brakes. Cool, huh?
He used to stop in my shop in Cambridge occasionally. He waxed eloquently about Sturmey Archer hubs and other things.
http://www.bikexprt.com/bicycle/mytwenty.htm