sosidge, that only applies to people running the graphite pinions. I run fairly small spurs with what ever pullly (78/81) so i don't think i am going to get much smaller than that regardless.
Had i have thought about it i may well have been able to ask Cecil on Saturday.
I've got to be honest and stay that i'm still not convinced that there can be a difference either way. Although i am prepared to go with Jesse on the movement of weight.