I have only laid the motors in the tray to see if they will fit. Pre Christmas rush has stopped work on it so far. I will probably use a silencer/manifold.
I note they us 1/2" flex to connect up, I will probably use two hoses to the tank.
The pump has been moved so all the pipework and regulator will be resited. This will stop the regulator catching on steps when it stuck out the back.
The 3 motors pulled around 10" same as the 6.6s so I hope the tank does not collapse!