can you or
@brian_k tell me more?
I have a Hewitt with cantis - if I'd known what I know now I would have specified Vs (along with square taper for that matter) when I bought it new from Hewitts. I get terrible judder on the front when flying down the likes of Pendle and am trying to isolate the reason.
I know some folks say that issues with Cantis are just due to ignorance and poor set-up but I have had this issue, plus poor braking in extremis, since buying the bike from Hewitt. And the guidance/remedies for folks on cantis always drag back unfortunate memories of winter afternoon O level physics and maths/trig lessons - Vs just work.