Hi have sent an email to Marty for an update
Hopefully we might see some images of the system installed.
I have a sister system (using the 2123H) and intend to fit a Tad 4001 driver with the 2311/2308. Aftermarket Be diaphragms maybe an option for those interested but the passive filters will need modification. I have Leap V, Sound Easy and LMS so its not that difficult.
Pending how it goes I may also mess with some other ideas like conical horn loading the 2123 to enable time alignment of the mid cone.The 2123 loads up very well on a suitable horn.
Still in the works is a dedicated class A active crossover using a double sided pcb.