I hadn't thought about that. ollyit replaced the deck on my searider with some hefty ply so I don't think mine are going to pull out.
I did go for the padded ones, but they have got quite a bit of adjustment. In summer I go bare foot and in winter I wear wetsuit boots, both of these fit no problem, but not sure about sailing boots, my Wellies won't fit
A friend who windsurfs a lot helped me out, and he said the correct fit was across just behind the toes, similar to a flipflop as any further back could break your ankles!!