Thanks for this information.
Well, I can always go back to the originals or modify the Senn pads. It's just when I saw this I couldn't resist:
imgur.com/a/pgseD#mj3jgXR
It's also possible I'll find the combination so comfortable I won't care. I like that the pads transform the headphones into more of an indoor type. I'll be mostly watching YouTube vids, Skyping, and playing the occasional adventure game. Only sometimes will I be doing something more delicate like streaming anime. For listening to music I most often drag the long headphone cord I use from the HiFi (with TV) at the other side of the room and use my Fidelio X1s.
My current computer pair passively dampen a lot of the outside sound, so I need a decently open pair of headphones to hear what is going on around the house.
P.S. How did you find the pads affected the soundstage?