Thanks for the reply,
So, i have 1x ZD 1100, and 2x 7731 Outdoors AP's.
I was originally going to buy a 2nd pair of 7731 to double the bandwidth, but l changed my design.
So, the building with the non-bridge AP is being upgraded, as in physically changing the building. So a new network design is needed, and IP addressing will be different. So i will need to change both the AP's IP address, say 10.10.200.1/24 & 10.10.200.2/24 (i might be able to go to maybe /29?). The ZD will end up on a different IP, keeping on the original addressing of one building.
Static Routes may be needed on each side, so communication will work between both buildings.