Thanks for the link Louis.
BG - I don't think it will affect the seam to seam measurement as much as it dictates the placement of the armholes. I am not an expert on this, so please take this with a grain of salt.
To those who have gotten well fitted shirts, are you taking body measurements or previous shirt measurements?
And could someone explain the basic collars that Luxire offers - are they super stuff/fused, etc.?