I have been working on one, but have changed it to use a 34 x 24 inch table.
I used 12mm linear shafts case hardened. with vxb $9.95 Linear bearings blocks.
I have extended the working range a lot. it is still a work in progress.
I have been changing a lot as I go to fix rubbing etc. My laser it a bit smaller 24x12 so I have to make some parts in 2 with a dovetail cut so I can glue them together.
I did not like the belt making the very tight bend around the 8mm bolt layout. I am putting the bearings on the inside and have the belt wrap around the 22mm bearing. I also noticed the spinning bolts where not true this fixed that.
I guess I can't post images on this forum.
I have changed the unsealed 1/4 bearings to a sealed type that cost less. 1/4 ID 22mm OD vxb Kit1080.
also added one in the center of the X to keep the shaft from whipping.
I also clamp the linear shafts in 2 places on the ends which reduces flex a whole lot.
more to come.