My Nuovo Record headset has developed an "index". It went away when I backed off the adjustment just a hair and still has no play, but I'm thinking I may want to replace it over the winter. Since NR headsets can no longer be found for a reasonable price, I'm thinking of a Stronglight A9 roller headset, which should be a lot more bulletproof. These have a stack height of 37mm. Would it be a direct replacement for the NR. How, exactly, do you measure headset stack height?