[LAU] Behringer UMC1820 experiences and sync settings?

Hi list, I am thinking of replacing my RME HDSP CardBus+Multiface after twenty years because it has never been really stable (firmware doesn't load reliably, multiface is sometimes randomly detected as digiface, random I/O box disconnects locking up jackd, etc.). This is sad because it is such a great card. Now I am looking for similar specs with a class compliant USB connection. I am trying to avoid Motu and the newer RME devices because I would pay a lot for (DSP/Mixer) features that would remain inaccessible for me from within Linux. It seems, and hesitate to say so, that the Behringer UMC1820 is the closest to my needs. Has many I/Os and most if not all of its settings should be configurable from the boxes hardware controls. The only thing I am wondering about is how I can tell the card to be a digital clock source or follower. Is this something that can be set with alsamixer perhaps? Does anyone have the card and can confirm and report on its reliability perhaps? Thanks! Peter