Thanks guys The foot pedal unit is just left left and right switched straight into the interface box as keyboard "left and right" I didnt need them to be analogue for this and it kept it simple.
I used a diamond plate pattern rubber sheet over a ply foot pedal.
Drilled some holes in it so it looked a little more military like.
The housing and base are MDF and I attached a door hinge to allow the pedal to pivot.
I stole an idea from another flight forum by adding a rubber ball behind the pedal so it will return back when you push it. Works great and has a nice feel to it.
The micro switch is mounted on each side with some adjustment room.
Add a bit of paint and the obligatory stickers and you're good to go.