^^are you on the new 3.0 firmware? if so, no hickups with it?
Firmware won't interfere with what opamp you uses.
Description and pics would be awesome!
I am on to lookout for a better line out. This looks like a good idea.
By any change, is the schematic of the x3 available?
I could not find it but that might be because of my bad search skills..
Schematic of the whole DAP? That's never going to happen.