There has been one published review of Stein Audio room treatments working well with the Bybee room treatment products, so there is at least one observation point of Bybee products interfacing with another company's product in a positive way.@davidpritchard , I own a Bybee Stealth power conditioner with Dark Matter options 1&2. This is an example of Bybee products working synergestically with Wave Stabilizers from High Fidelity Cables and Pulse Gen ZX from Audio Magic.
I am sure that Bybee products work well with many other "tweaks" as well.
Cheers,
John