It must be nice to get advice from the top runners!
Ok, so I'm gonna go with 42 , but really upright (rake only 2), but what is the influence of the canting of the fins? Some say to go straight, but the pro's you now all have canting, what's the advantage?
Some explanation in this, but if I was going to order fins to race I would take the manufacturers advice on what combination would work best. Rista also have a general size guide on their website based on board width.