Sennheiser HD 4.50 BT to Sony V7 Headphones Cushion Adapter

So I've had these Noise Cancelling headphones forever, but never really liked the cushions. The opening was too small and always squished my ears a bit, but they were good enough for cutting down background noise at the office. Well the original cushions finally wore out, and when I went looking for replacements, I found this reddit thread suggesting that instead of getting replacements the same size as the original HD 4.50 cushions, you can buy replacements for a different set ( the Sony MDR V7 specifically ) and use those as they're more comfortable. Well I went for it, and can confirm that's a great solution. I did also find that I needed a little something to help the larger pads fit on these headphones which are smaller than intended. Another commenter in that thread showed how they did it with cutting out some plastic by hand , and I figured I could do a bit better. A few paper rough-outs and a couple prints later and here were go. Instructions - print at whatever height it takes to get 2 layers. I use a Prusa Mk3S in 0.20 mm resolution, so that was 0.40 mm for me. At this thickness probably any filament will work, but I did mine with PETG (it was the only spool I had in black). Once printed, to make it easier to slot into the headphones, you can take a pair of scissors and cut a slit in the oval so it will flex as needed. I also experimented with printing a more horseshoe shape rather than a complete oval, but honestly cutting it with scissors was just easier. Insert first into the slot on the HD 4.50 headphones, then wrap the new cushions around your printed plastic rim