Nice work so far Jeff. As far as I know though, only one control column should be fitted to an operational aircraft.
The bomb load would depend on the target - 'area bombing' would normally consist of a mixture of 500lb GP bombs, and SBC's of incendiaries, but could also be a full load of 500lb or 1,000lb GP, or 2,000lb MC bombs, with the 'heavies' doing the bulk of the work, and the Wellingtons making up numbers.