I found the MultiStyle info in the manual of all places.
I got that worked out but it's not hiding the substyles in the list like with the PG MultiStyles.

The other issue it's not importing the patch correctly and leaving channels out in the pic ch 5 & 11,
see the Reaper tracks below.

Attached Files (Click to download or enlarge) (Only available when you are logged in)
BB21-Substyle-Hide01.png (20.21 KB, 68 downloads)
BB21-Substyle-Hide02.png (24.05 KB, 67 downloads)
BB21-StyleWizard-Import.png (322.74 KB, 152 downloads)
ClubHouse.T551.mid (81.84 KB, 0 downloads)