I hear he's building something like that Yamaha Sound Projector, but with replacing the 42 channels of 2.5W amp plus 1.25" driver with 42 channels of Halo and M80. That will allow all the speakers to go at the front of the room, simplifying wiring and furniture placement (and leaving more room for oak ).

You can understand how a system like that would have to be assembled in stages.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8