After a lot of applicance of SCIENCE to calculate my probable size I took a punt on mail-ordering Sportiva Venoms in the end. Not worn them much in anger but I reckon we'll be very happy together. They seem to have a lovely balance of flex, stiffness and incredible big-toe directing power. Llike a very snug glove (a fit that can only be described as erotically crippling!). Looks like the time I spent feeding my Boreal Stingma, Montrail, and Sportiva sizes, and those of people in published rock-shoe reviews (and Golt) into my giant super-computer COLLOSSON was not wasted!