This is an enclosure for the PanelDue with 7" LCD that mounts to the bottom frame 2020 extrusions on my Ultibots K250 Delta printer. It slopes the face and makes it the perfect height for using on a desktop from my desk chair. The front latches to the back for quick access to the Panel Due. The design is adapted from DC42's PanelDue enclosure.
This was designed for the Ultibots K250 so I am not sure the 300 has the same 2 sets of 2020 extrusion for the bottom frame or the correct height. I did find that I only needed to use the top 2 holes and attach to the top 2020 extrusion. Also, I had to orient the large pieces with the long direction pointing directly away from a tower with the K250 with UMBE to avoid a mag ball rod coming loose.
There are 2 different Panel Due Front STL's. One with integrated tabs and one without them. There are also STL's for the tabs and latch only. (Print 1 each of the tabs an 2 of the latch) This way you can print the front with a larger nozzle and layer height but print the tabs with a smaller nozzle and small layer height. Also, printing them separate gives the correct "grain" for the tabs. If printing separate you will need to bond the tabs to the front. I printed in PETG and used JB Weld for bonding. There will be some filing necessary on the back where the tabs and latches go so do that first for a good fit, or you might try resizing the tabs and latches a little smaller. I held the front and back together with tape, rubber bands, etc. and reached through the hole for the LCD to position the tabs and latches.