Hello Ben F (blueline) !
Shame on you Ben, heh heh !! That photo in your post above depicts NOT A BMT "Q" TYPE !! It shows an IRT LOW-V Car and train with body side extender steel plates (and slanted side baffles to prevent cretins from riding on the sills, heh) -- so as to be able to run on both the BMT Culver Shuttle and the BMT Franklin Shuttle. The BMT wooden "C" type EL cars were created from gate cars in 1924 using a similar "body extender" plates -- to close the six-inch gap where 9' wide cars were run on into stations designed to clear 10' wide subway cars.
Here below - top photo shows a side view from street level, notice NO CENTER DOORS - and the bottom photo shows the head-on "face" of a Q Type -- and you know where these were taken !
Have a Happy Holiday Season Ben, and the same to all here at OGR Subways / Transit / Traction Forum
regards !! -- Joe F