Hyper-V - Any limit to nr of USB devices / host pci/pcie controllers

Hi folks
Hyper-V Gurus

Is there any limit to the number of physical USB devices and / or pci , pcie controllers you can attach to a Guest running on a HYPER-V host.
(Obviously within the constraints of what the native HOST can handle).

It seems that HYPER-V uses a "USB re-director" and I think there's a limit of 4 on this - but has anybody tried this out.

The reason I want to do this is that I'm experimenting with a small (micro) size arm processor box to run W11 and will need a whole slew of USB / pci attachments so there is logic in the question.

Incidentally on a decent ARM processor W10 at least flies as a VM -- now to get it to run native and then W11. Graphics drivers seem the main drawback here but I'm working on it !!!!.

These look good ---- anybody yet !!!! (ARM GPU's)


Cheers
jimbo