Adventurer 5M Pro Tool Tray [Remix]

This is a remix of the tool tray by SJ-Homemade for the Flashforge 5M Pro 3D Printer, but please feel free to remix it to work for your printer. Changes I've made from the original:
-I've resized the tray and added a ‘Gridfinity’ base to the tray area, because there is no good reason not to. It works as a tray even if you don't use the ‘Gridfinity’ bins. 
-The resizing also makes it more sturdy, having a stop on the left.
-I've removed the center utility blade holder, it is difficult to use when ‘Gridfinity’ bins are used. A very useful trench on the top takes its place and it has room enough for probes and picks.
-The caliper brackets were redesigned to not need support.
-I kept the stylish chamfer-rich design even though it increases support waste, but it is such a small amount.
-There are two versions, one (V4) with a USB (A) drive slot and a few SD type slots, and the other (V3) lacks those extras.
Of the two versions, I've also included versions with supplemental supports that still need automated support from your slicer. I've tried to minimize support requirements, but I also wanted it to look nice, print reliably, and be easy to post-process.

Printing: Any filament will do, I used .28mm layers. 3 shells and 15% 3D infill works fine.