Wow!
My Behringer 404HD already arrived and I can’t test it because I have to work. Cruel world!
I just ordered yesterday around 17h. So I’m positively surprised at the delivery time.
I also wonder why the bass build kit did not arrive yet as I ordered it a few hours before the DAI.
Since I don’t want to do a second recording - Billie Jean Practice as Caped Bassist 
It’s recorded with my DAI.
I routed the Line-Out of my PC to the second input, adjusted the mix at the DAI and used headphones (as you can see) as monitor. Very happy with the result and it was a lot easier to find a setup to record while hearing the backing track.