Check out section 37 in the plans for the AFP pump and filter install.
I didnít install the AFP filter and just left the bracket in there behind the pump.
For the Andair valve, I just chopped the already installed bracket and riveted a new 063 plate in there to suit.
All pretty straight forward. Access is reasonable at this stage of the build.
Consider the access plate in the side of the tunnel if you havenít already.