On whatever model replaces the X1850, you NEED to make the faders replaceable.
DJMs have a little plate and connector that you can remove from the top of the mixer and replace each fader. I’ve unfortunately broken 2 of the faders on my X1800, and when i looked into repairs, it required a 100% disassembly of the unit to do so.
I can’t find a teardown for the 1850, but it doesn’t appear to be much different.
Please denon, I beg of you. ON the x1900, make it easier to replace these. They WILL break, and I’d like my 1200-1400$ mixer to not be rendered useless by what could be a 30$ part.