I've searched but was wondering what is the most workable size for a box blade or a tiller on a 3515h? Im just asking because a tiller will stay level while a box blade can be tilted for road repair and such. I believe the standard 60" tiller would be ok and cover tire tracks , but what standard box blade would be good for the same width of the tractor tires?. I mean standard as what can be bought from Fleet farm or Tractor supply( all i teally have around)