Hifiman HE400SE closed back shell mod

Fully made via Tinkercad with a lot of trial and error to get the fit right. The white foam is just some packing foam I found in a box, so feel free to experiment with what foams you want. I attached them to the inside using construction adhesive. When printing, the flat ring that's supposed to be sandwiched by the HE400SE's ring that holds the grill might snap because it is thin. An easy solution would be to reinforce the part with a thin layer of construction adhesive. That should add some reinforcement without making it too thick, and adds just a bit of flex to the part in case it snaps a little. This is to be printed with the Hifiman logo facing up. Use supports. Mine is printed in Kingroon PETG. (not HS, I believe).