Hex 2 Piece Headphone Stand

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This is pretty straight forward. Print:
1 x Hex Headphone 1
1 x Hex Headphone 2
4 x Hex Headphone Spacer
(Optional) 1 x Hex Dual Adapter

8xM3xWhatever screws. Length doesn't matter much on these as the center hole runs the full length of the 40mm spacer. However, the hole is intentionally tight as it will be self threading and the longer the screw the harder time you'll have getting it fully into place. I don't think I'd try over a 10mm screw. I would personally go with an M3x6 or 8's which is more than adequate for length/strength.

I used PLA +, but PLA should be plenty strong. I'd recommend at least 4 bottom layers and 4 top layers. I'd also recommend a minimum of 3 perimeters/walls. Infill should be at least 20%.

You'll have a tiny bit of flex at the top and that's how you insert the adapter piece for dual headphones. Just hold 1 side of the stand in each hand with the adapter on top and gently pull apart until the adapter slips into place. You shouldn't have to force it or flex it very much.