Hello,
I own both Hx Effects and the Cab M +.
I really like it as a combination.
To solve every problem, I connected the Cab M + in send / return2 so that we can position it at any point in the effects chain ...
The send / return1 is available to be connected to my tube head (GrandMeister Deluxe 40).
I use the Hx Effects output to go to stereo in the sound card or mixer.