Went with leap on the gutter in the end after crunching some typical one turner numbers. Made the assumption that weather was standard, the kick was short, the gutter only gets pushed one square, the opposition are not tackle heavy and the gutter is not marked when receiving the catch. Was surprised to find that sure feet only improves the whole move by about 3% (45.4% from 42%) but leap is about 12% better (54.3%). I guess is this is because it removes the highest roll needed from the equation - the 4+ dodge. I also tested to see what happens if I rolled a double next skill and took 2 heads on the sure feet build or VLL on the leap build. Two heads makes it a 59.8% chance so has a massive impact but the VLL/leap combo still edges it with 61.7%.