Hi Andrew !
Thanks ! The height of the bottom section is to get more space and to use 50cm height plexiglass without having to cut it twice.
But sure, if you want a smaller box, no problem.
Pictures of top links here: 3d.shoyun.eu/app/tl1.jpg & 3d.shoyun.eu/app/tl2.jpg
Maybe you wanted to use top links to attach the bottom too, it's not possible as they only have 2 screws in the top table and they are inverted. They are made to hold plexiglass only but i can modify them for you to fit as bottom section.
If you prefer custom bottom sections as these here, i can do them for you, just let me know what you want :)
Ps: Sorry, i didn't see your message before !