Any question answered...

That problem was solved about 1990 when oversized tubes started to appear, not that it was such a huge problem anyway, except in people's minds. The actual problem with lightweight steel frames in old-school tube diameters was a lack of torsional stiffness in the front triangle leading to tank-slappers at quite modest speeds. Again, fat tubes solve this without a huge weight penalty.

also Nelson Vails.jpg