Jon: I, too, am in favor of your posting pics.
It's not clear in your original post, but will you be restoring the Martin or simply installing what has already been restored? If it is the former, might I suggest a small modification.
The original wooden seat in the 250 is made of a notoriously thin chunk of wood. This probably worked back when your average gunner was around 150 lbs dripping wet, but if you plan to have folks from the 21st century actually use this turret, might I suggest using a thicker slab of wood to avoid warping to the seat over time. Remember that you will have electronic components attached underneath. Also, when the seat warps, sometimes the spring latches (attached to the seat) don't meet up with the holes in the frame like they should.
Much success on your project!
Great, do please provide as much as you can, as well as "detailed" close ups. Thanks for inviting us in on your project.
) this week with a few people getting typed in the 17 and a few trying flights(these i should be able to go on 
