Cardputer wrist mount

This is a simple wrist attachment mount for the M5Stack Cardputer!

This mount lets you easily attach and detach the device from your wrist using the devices built-in lego attachment points, and (optionally) four 2x4mm magnets. 

I think it has a very cyberpunk or retrofuturistic look to it. It's kinda reminiscent of a Pip Boy, or a Nintendo power glove. 

The primary design goal for this mount was to make it easy to print, and make it lightweight and comfortable. I think I succeeded there, however the assembly is a little more annoying than I would've liked. 

My mount feels pretty sturdy; I don't think the Cardputer is gonna fall off accidentally. However, your mileage may vary. Use your own judgement with regards to how you use this mount. 

Bill Of Materials:

• 3D Printed top + bottom piece
• Some small pieces of filament to use as “dowels” (optional)
• Four 2x4mm magnets (bigger magnets are difficult to fit in the slim design, optional)
• Epoxy, or another strong glue
• Two 22mm watch straps. (I used cheap fabric ones from a multi-pack)

Printing Instructions:

No supports are needed, however you should ideally print on a smooth surface like glass, so that the two halves mate properly. 

Test your tolerances using the “test” model beforehand, if you'd like. The lego snaps should click in to place, but be easily removed.

Adjust the x/y offset in your slicer if the pegs are too loose or tight.  

PLA seems to work in my testing, however PETG or another strong/semi-flexible material will be ideal for the strength of the snaps.

PS: if one of the snaps break off in your Cardputer, it should be easy to remove by just taking off the back case, and pushing the peg all the way through.

Assembly:

Cut 6 small (~4mm) pieces of filament and stick them in the holes of the bottom half. 
The filament pieces should be barely sticking out above the surface. 

If you are using the magnets, attach them to your cardputer's back and mark the exposed end with a marker. Then, place the markered end into the holes on the bottom half. Be sure the polarity is correct so that the magnets attract the cardputer. 

Test that the top half fits on to the bottom. 

Mix some epoxy and spread it thinly over the top half, and connect the two halves. 

Keep the halves lined up and pressed together until the epoxy sets. Using a clamp or two here is a good idea, but if you have quick setting epoxy you can just hold it. 

(Note: in the image above, the filament “dowels” have not yet been trimmed to size.)