For anyone wanting to build one of these trays, one of the adhesives used to glue acrylic is called Weld-on 16 . They also have other thinner versions. The weld-on 16 is a bit thicker and fills gaps a bit better.
I have also found through searches that a saw blade with a high number of teeth with no offset is best. Blades designed for cutting aluminum or copper are the best. I have not tested this yet.
I am planning on building a smaller 4 (4X5) sheet version and if it goes well, the 6 sheet.
Thanks to Monophoto (I don't know your first name) for all the information.