It is clunky - you are right.

You need a preferences option in the 218 that says MQA = Analogue or SpeakerLink out and everything else via Coax.

It should be possible.

Cheers
Tom

Main: G61SL, 218, HD621, 2*7200SE, 7200HCSE, M6s, DSW, Apple TV 4K, NUC (Roon server)
Secondary: Wiim Pro, 3200, Audio Core 200
F80