Quoted from ToucanF16:Zach, tell us about the edge detectors. Can they be added on after the fact? How difficult is it? Cost?
Step Edge Detectors can be added after the fact. BUT it depends on how old your unit is as to which kit to order. Older units will need a new toe plate to accommodate the Step Edge Detector. The age can determined by your serial number.
Installation after the fact is not the easiest and you will need an 11/32 open end wrench but is doable in about 30 minutes. Talk to Zach about which kit you need as one kit includes a toe plate for older units and will cost you more.
You want to concentrate on balance with a large heavy load so I always suggested the Step Edge for customers who were moving large heavy units (safes etc) or if you feel uncomfortable about going down it can give you that confidence that you are in the correct spot to begin going down.