That looks like it works very well, I could use that for my printing plates. Its hard to see how you actually built it and what material you used, could you post some kind of design scetch and the materials used. I think quite a few people would be interested in seeing that. Thanks Brian
I forgot to add the holes are 3/8” . You can make this out of what ever you want as big or small as you like; I was going to make it out of small plastic cutting boards (that stuff lasts forever) you can also put longer pegs in the holes to hold trays, big mugs ect... I have short L-brackets on the new one I made, I'm thinking of adding longer one's to stabilizes it a little better but it's not bad the way it is.
Thanks Sam; This isn't anything new, I had something like this years ago that was made for the pantograph all I did was make it smaller and figured a way to attach so it slides on and off.