Hard case for Spektrum USB programming cable SPMA3065.
Offers more protection than the "DIY" original design with heat shrink sleeve wich can lead to PCB board breaking or wear.
Allows removing the original with the original cable plug that was initially captive under the sleeve (just beware of polarity).
As a gadget, it offers also optical access to the activity led of the adapter (OFF or ON depending on the connection to a receiver).

I did not use the brim feature for adherence to avoid ugly outline due to finishing (can't select brim only inside hollow part...).
For such part, I build the brim inside the 3D model (0.2 mm thickness) and use the skirt feature in addition.
So I provide a normal (no brim) STL and a special one with added brim inside.