A word of warning. I've read reports that boats with straps positioned as this picture were said to not be class legal at the A Class World this year: it "increases the hull length". You may agree or not with the decision, but the chief measurer was adamant. Depending on which class of boat you sail you may want to position them differently.

However, considering the number of F18 with straps like this, it's probably a non-issue for that particular class.