Sure, I'll check those up. But damn, those focus pads are quite pricey. I'm saving up for my next portable can (Philips L1) but if those pads are soft like kitten fur. Sorry about my wallet.
You're already a big help, but please excuse one last question. How does the DT 990 pads compare to the focus pads in terms of comfort and sound quality?
Edit: Does the HM5 pads fit the HE 400? How'd those compare too?
DT990 pads work ok, but not great compared to the HiFiMan FocusPads. They don't have the necessary foam density to maintain the planar subbass response. The comfort factor is pretty equal anyway... You're splitting hairs on two of the most comfortable pads on the market. The sound upgrade on the FocusPad is worth it, IMO.
If the Beyer pads had just a little bit more room on the plastic mounting circle, you could fit a HiFiMan foam spacer in there with the mounting ring, which would totally fix the issue, but I've tried again and again, and it just won't fit.
I personally hate the HM5 pads. They are incredibly veiled, in my opinion. They are very soft, but they're kinda hot, and the detail loss was unacceptable for me. YMMV.