It is just a subjective observation which I have not had time to research properly. Mine has just had the -4 blades fitted and the other day I decided to put the blade tie downs on as it was out overnight and getting windy. I retrieved the tie downs from under the seat and ithe front one would not fit as the cord was not long enough. I had to find a piece of rope to extend it and make it fit comfortably.
Are they perchance longer?