dunno about the mech but a 30.0 surly or salsa seat clamp will fit.

following the fitting instructions, is more important than facing

From the Shimano instalation instructions…

“Face and chase the BB shell. This will ensure
that the bearings are properly aligned and will
prevent excessive bearing wear and creaking.”

so, not a shop conspiracy after all then :o(

cheers! hopefully not too much standing round in the cold for me then :o)

sorry to hijack…
is it a 1.30 start for the “grown ups” – i’ve got confused somewhere along the way. ta.