Can my cart have all swivel casters?

All carts can have swivel casters. However, this is more practical for some carts than others and there is an up-charge for all swivel casters. For the EC Series, all swivel casters work fairly well. For the NB Series, all swivel casters work fairly well but this requires that the battery box be raised and shelf clearance is reduced. For the PC Series, it becomes difficult to maneuver with all swivel casters. If a customer wishes to switch casters to all swivel after a cart has been shipped, this is simple for the EC and PC Series. For the NB Series, this is more involved because the power pack must be removed and re-installed in the "raised" position.