It's just plugging in either of my CA iems into the switch headphone jack itself. Guess they're just extremely sensitive since if i plug just any other headphone in they don't pick up the same feedback. I have heard some usb dac/amps work with the switch via usb so might go that route.

Anyone else get weird feedback when using iems on their switch?

A little of both.

A friend had one of these but theirs ended up breaking within a week.

Should honestly be fine but I'm not familiar with the pairing, the good thing about the 6XX is that they scale really well with gear.

are any of the dekoni pads good with the clear?

if you don't manage to get to post in sale section you could try R/AVexchange, theres actually someone buying eikons there as well.

Looking forward to trying these out one day.