Quadsitter with a 5th pusher motor

Hello Folks.

I have a quad sitter VTOL, with a 5th pusher back motor for FW. Just to be clear,

(A) 4 motors for lift
(B) 5th motor for FW

They are all in the same plane. The UAV also has ailerons. None of the motor have tilt.

I want to understand as what airframe should I select it on px4 qgc setup, and how to configure the 5th motor. I want to be clear before I test the transition, lest I’ll break my UAV.

I want the 4 motors to be used for hover phases, and 5th motor for FW phase (in which 4 motors should turn off)

That’s currently not possible, we would need to get this pull request into the PX4 code base first. Can you help me with that?