Since when has butting become essential, whats wrong the straight-gauge, really its a bit heavy. but really, for 169 where not talking about some TT split second thing, if your doing up trusty old bar rig, why not go for the cheap frame from chile?

As i understand it, double butting does not make the bike stronger as they butted tubes are drawn thinner, so they are just as strong as straight gauge, but lighter, and if infact are more suceptable to denting and dings, in everyday riding