I'm using the Xdeep spine pouch.I just did the same! How’d you set your weights up? My intent is to use the bungee plates, but interested in what others have done.
However since that rig is destined to be my warm water travel setup I'll likely only need 2-4kg at most which I will bungee onto the drop D rings so I might ditch the pouch or find a way to make it easily removed.
I'm in the process of reworking the whole thing using some SumpUK bits.