I designed this bracket for the Sony MDR-XD100 headphones. One of the original brackets broke and I decided to design a replacement.
I had some trouble with the print quality on the slides, but I suspect that was from deflection during printing. I recommend some supports, however I have successfully printed it in PLA without. Due to the large overhang angles and long bridge at the top, you need good build plate adhesion and adequate print cooling to print without supports. Although my print quality near the top was not great, it didn't affect the fit or function of the bracket at all, so printing without supports should work fine.
For reference, I'm running 200C extruder temp and 60C bed on a laminated PEI on glass build platform on the MP Select Mini.
Printed at 0.175mm layer height in AMZ3D PLA with 100% infill just to make the thin arms stronger. Prints fine with lower infill, just not as strong.
Designed in Fusion 360 using the Attached Canvas feature. Took photos of the bracket (Top, Front, Right, and Arm Cross Section) and inserted them into Fusion 360. Using some initial caliper measurements, I scaled the images and traced the non-critical dimensions, and measured the rest. I might optimize the transition block by hollowing it out a bit to save plastic and reduce print time since it's best to print at 100% infill. If there are any requests for this, I'll spend the time to do it.