In the 70s it was common to see a lot of drilling on a TT frame. Including the dropouts.....Some went as far as having the chainring, brakes [not just the levers] and the rear deraileur as well not forgetting chunks off the frame [under the BB] or lug cuts outs you could hide a a big cat!.....Condor made a frame whose chain stays were slotted and i think so was the fork.....That was the fashion and of course the ideal wuld have been 531SL.....My standard MKM did not cut the mustard at Shaftsbury CC in east London.
In the 70s it was common to see a lot of drilling on a TT frame. Including the dropouts.....Some went as far as having the chainring, brakes [not just the levers] and the rear deraileur as well not forgetting chunks off the frame [under the BB] or lug cuts outs you could hide a a big cat!.....Condor made a frame whose chain stays were slotted and i think so was the fork.....That was the fashion and of course the ideal wuld have been 531SL.....My standard MKM did not cut the mustard at Shaftsbury CC in east London.