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@samueldavidkeyes
There's been a thread on this before, but my issue is a little more complex. I have forks which leave very little clearance between the drilling and the bottom of the bearing race. The caliper can be spaced out easily enough, but it's the nut on the back that is the real bugger. If I use old-style non-recessed brakes, then the nut will not tighten down as it binds against the bearing race, however if I drill it out to accommodate recessed-type fitting, there is going to be precious little room to accommodate the flange of the allen nut, and I don't want to go drilling the fork to discover that later.
Do you reckon that I can safely file a couple of mm from the bottom of the aluminium cup which holds the bearing race? The headset is a 1" Tange job (falcon?) which looks like a campag copy.
Any ideas please!