Ditto just this week.
A minor gripe from me as a new user. The manual describes what all the different settings do more than it describes how to make it do it.
An example, the button presses to store /load settings is not very clear and even now after doing it right, it's a bugger to do again.
I have now tested an idea. It is possible to load multiple setups via one key (one on the unit and one on the remote). So pressing this key repeatedly would cycle through the setups - one press would offer confirmation, second press would confirm, display the name of the setup and load the setup, third press would again offer the confirmation for activation of the next setup etc.
The trick is to remap the selected key to point to the next setup. Let's say it is the "I/O" key which will bear the new load setups meaning ("2" on the remote). For the Setup 1, the key will be mapped to "Setup 2", for Setup 2 to "Setup 3" ... for the final used setup it will be mapped to "Setup 1".
To achieve this, it is necessary to enable key remapping in Settings (SETUP -> Options -> Remap Keys / Diag. -> Remap keys), set the value to "On".
Thus both keys on the unit (VOL, I/O, EQ, SETUP) and their counterparts on the remote (1, 2, 3 ,4) would be remapped equally.
Then after full customizing of the unit as the final step prior storing the setup, the selected key (e.g. I/O) needs to be remapped to load the next setup (e.g. Setup 2 in case of storing Setup 1).
I recommend naming the setups, e.g. Setup 1 as "Factory", Setup 2 as "Bitperfect D/A Sharp" etc.
If you plan to use different headphones, I think it is worth saving minimal volume settings with each setup, so fast cycling through all the setups with the most sensitive headphones plugged in while the music plays is safe.
Edit: Equalization presets 1-20 are not affected by settings setups. Loading a setup cannot activate/preselect or change a specific saved EQ preset (1-20). However, each setup can have its own private equalization enabled after loading, thanks to Manual preset. It holds the EQ which was active when the setup was stored. And with this technique, one can also name setups after headphones or speakers like "hp Foo eq".