Originally Posted by
Velognome
10cm? All day long! It's wise to clamp the Bridge so you don't put stress on the joint. I spread this from 110 to 120 without any issue.

I presume that you mean both the chain stay bridge and the brake bridge. What method of clamping did you use? That's a gorgeous bike. BTW, I also have a Maclean Featherweight, 1957, KD403.