Several months ago I purchased two of your inserts for my Rigid R4512 table saw. I bought the table saw because it fit in my shop due to its ease of movement and thus far it has been a solid unit. However, it does have a flaw and that is the insert. I tried making my own zero clearance insert as I have done on many other units but due to the set up of the opening it is a very difficult item to construct. I purchased one with the slot for the riving knife and one without for use with my dado head blade. I have found both to be of exceptional quality and have not regretted my purchase in the least. Should I wear out either item I will be purchasing them again but not sure that will happen as they show no sign of wear.
From: Shawn C.