Still trying to setup LAGG on AC87U - help very much appreciated!

I'm still trying to figure this out and would realy aooreciate some help/feedback
So far...

After a LOT of reading up from various places I found this diagram: View attachment 4579
which started me trying to understand the architecture of my overly complex ac87u, or so I thought...

Anyway armed with this I tried making some changes to your initial steps:

nvram set vlan1ports="1 5 7*”

nvram set vlan2ports="0 7u"

nvram set vlan3ports=“2 7t"

nvram set vlan4ports=“3 7t"

nvram set...

Still trying to setup LAGG on AC87U - help very much appreciated!