Bear with me, I'm just posting out-loud...
I've got a late 90s Barcode frame doing nothing at the moment. I'm loathe to sell it, the damn took too much effort to make rideable as there was about a pound of paint to strip and a jammed seatpost to tackle. Very good geometry, but too heavy. Right now it's in the shed whilst I ride my Standard (which must be, ooooh, ounces lighter). So I was wondering if I could lighten it a little, in a warranty-busting fashion. I know I could trim the dropouts and drill the seattube under where the clamp goes, but why stop there?
Is it possible to mill out metal on the tubing so that it's thinner? Kind of like a Grim Reaper but not all the way through? Wouldn't save all that much weight, but a lot of the strength would still be there.
It could also be made a little lighter (and up-to-date) by enlarging the holes in the bottom bracket. Anyone any ideas how that could be done?