wooddragon48
Then then I need a model of the controller board so more measuring and reference photo digitizing and a FreeCAD model was born.
What followed was multiple iterations of how I could package the controller and mount it to a battery. I went trough many versions but this is what I settled on. 
I think that the look and feel is quite good and could be a product that belongs in the M18 tool family.
I included a recessed toggle switch in the top so that it can be easily turned on and off, and not be accidentally switched on.
When I was happy with the design, the build processed started. As with many designs it took me w few iterations to refine the design and fix a few design over sights.
Getting a clean print for the top proved to be difficult with the shallow angel that I designed in that created over hangs that proved difficult to support. I ended up creating my own supports in FreeCAD with first a version that allowed bridging and could be trimmed off the finished print. Next I tried a shelf method the could be positioned to create the required gap between shelf and part.
Both methods worked out well enough.
Using the spade terminal assembly to tap into the battery work perfectly the very first time and was most gratifying.Though out the design I used heat set brass M3 threaded inserts and M3 hardware to screw the various parts together. That might have been because I figured that I would have to assemble and disassemble the case multiple times.
On a suggestion from a friend I add a version of the case top the can be customizable with an inset logo that can be back filled with paint post printing.
sjm4306
Andrew Mitz
morgan
NPN