Hi Jean-François
I'm surprised by this and was able to confirm by looking at documentations.
That said, if you look at the IMT, you see that 3210 is supported for Balance 4.1.1, right ? You mean you wouldn't be able to buy licenses for each of your 7-mode controllers, including 3210 ?
As for HP, yes, I think you can forget about that, but it is not consistant with the IMT that still says that other vendors are supported...
I'm not being very helpful here, but keep us updated if you find informations 🙂