Friendly PSA :
For all those having fit issues, while I never had an issue with fit, it is important to remember these are not like IEMs or earphones but fall somewhere in between.
They are meant to float on the edge of the ear canal with the provided ear hangers keeping them loosely on the back of the ear, if they are pressed in or the ear hangers too tight then the fit is definitely wrong.
As such, the sound & fit will obviously suffer.
It does take some getting used to but once you get how, it works ridiculously well.
I will comment those who have used the VE foams &/or iSine ear hooks have the right idea though the staging & sound may not be ideal.
As a side note, I've had the KDE 250 for over 3 years & use it infrequently mainly due to anything happening to the fixed cables as given I am outside the US, even at Drop's old price, it's not worth shipping to Koss if anything goes wrong but that's just me.
But I have seen others do mods on this so for those who are interested, just search.
Hope everyone has a great day !