This is case for the Open Workbench Logic Sniffer as sold by Seeed/Sparkfun/Adafruit etc.
Lengthways the case is 99mm long, so if you are printing this on a Cupcake you will want to make sure that you can print the full 100mm on one axis of your printer. I had to make a couple of changes to mine (change endstops, trim Y-axis pulley) and you will want to make sure the head is centered correctly when the print starts.
Also, given the size of the object you will want to make sure you are using a heated build platform otherwise you will no doubt have some issues with warping.
Four buttons are included in the design, only two are needed, but given the small size they are likely to have issues, pick the best two to use.
The OpenSCAD files are also included.
This was based on the Bus Pirate base I also made.