Digi 003 with Audient iD 44mkii

[kt90]

hi people
Ive just purchased an audient iD44 mkii. I am trying to add this to the 003 desk as extra inputs. I have a Toslink cable. connected from the audient out to optical in on the 003. Basically I want to use the preamps from the audient and still have use of the desk for a control surface. Is this possible? Or do I just open the session and use the audient as the playback engine for recording. then when all the audio is recorded change the playback engine to the digi 003.
When I want to bounce down I want to try use the audient converters to compare. Any help would be muchly appreciated. I am using windows 10
Thank you

Keith