This is a form fit cover for your Lab599 Tx-500 Discovery radio.  This is a single piece lid that covers the screen and dials for transport.  There are slots on the top and bottom of the radio for a piece of Hook and Loop to secure the lid.  The hook and loop shown in the picture is 0.75" from Amazon - https://a.co/d/0079KsCC.

I printed this lid in PLA with a Gyroid 15% infill.  No supports were required.

The lid shown is using letters that are embossed into the lid by 1mm.  I have included an extra file with the letters inlayed if you would like to use a multi color printer and print the text in a different color.  Since this is an STL file you will need to fill in the letters with the second filament.  Also if you would like a lid without the lettering just use the multi color file and a single filament.

Also in the picture I have my callsign on the interior of the lid.  That is removed for these files, however would be a good place if you want to use the slicer to add your own callsign.