Yep that is totally what I was doing! I had done all of the above EXCEPT the bit about transferring it to the Captor X. I will confirm this is working as expected in a few days but I’m sure that is the key.
Thank you for the quick response!
I just purchased a bunch of DynIR Cabinet Packs (Black & Gold, Mesa Boogie Collection, Pete Thorn Collection) and it looks like every single cab in each of these three packs only supports a single microphone (eg there is no Mic B, or Mic B goes away when you're on a preset with a Mic B and then...