I made a wasteboard with 200 threaded inserts in a 2" x 2" pattern using a piece of 5/8" MDF. It is 41" x 23", so basically the size of the stock wasteboard. I decided to attach my wasteboard on top of the stock one. This still gives me over 3" of Z clearance with the spindle clamped about 1/2 way.
I was pretty happy with the way it turned out right up until I realized that there was no longer any room for the work piece to fit under the side extrusions. So, basically I’m limited to 41" total workpiece width. I’m sure I’ll wind up making a new one to replace the stock wasteboard eventually but I’m going to leave it as is for now.
I’m wondering though, for those of you with an XL, how often do you have your workpiece overhanging the sides of your machine?