Ok so add a center beam vertically on the back of the wall module and and a member projecting forward to the beam. In this shown configuration it will want to slowly flap like a bird.
This is another topic David And I spoke about last night. The difference in this design and 80/60 is I’m working with that negative space allowing me to only worry about 3/4 inch (29mmm) on a fixed plane so I won’t need to move the motors out once I choose a fixed distance. This design is working with a possible 3/4 base sheet, then a waste board, undetermined thickness then a work piece possibly 3/4 or grater, if you eliminate the waste board that is still 2.28 inches or 58mm add a waste board you can be very close to over 3 inches in material. That is a lot of movement and possibly a lot of adjustment for just standard work. Then consider that we are talking thicker parts for advanced users and the distance out that goes. This is why it needs to diverge to Unistrut at that point.
This is the Elephant in the room.
The top area is a problem in all of the designs including mine until tested and proven @bar style.