I got half way into building a system with 4 LAN ports that I'd would all
have the same vlans (for the most part) and have them bridged.  Does anyone
use or refuse to use a configuration like this?  The configuration of the
interfaces gets complicated with 4 physical interfaces, 6 vlans and then 6
bridges of the vlan interfaces.

Can I then NAT between the bridges like I can between vlans?

If it's technically possible, has anyone any experience that might advise me
away from such a configuration?

Thanks,

peter