I put my Ron Cooper frame in to be painted at Colourtech in Dartford years back. It was 126mm spacing and I had some nice mavic wheels with the correct spacing that I planned to use.
When I dropped the frame in I got a nice surprise, in a small workshop at one end of the building Ron Cooper was there and still building frames.
So I asked him to fit a second set of bottle mounts which he duly obliged.
When I got the frame home I was quite puzzled as to why my nice mavic wheels didn't fit properly.
Turned out Ron had re-spaced the rear end for me and didn't mention it..... Fun times and a pleasure meeting the man himself
But I guess what I'm saying is that Winston Vaz will have the skills to re-space that Roberts frame