I manage the LDLD like described by Dartington in his book or Omlet manual for their commercial version of DLD (Dartington Long Deep).

With two dividers I can home three 6 frame colonies. I designed 6 frame boxes so that 3 of them can be on the top of my 21 frame LDLD.

LDLD - Langstroth version of DLD. Original DLD uses British frames. I use Langstroth deep frames.

Holds 21 frames when the divider removed.

Accommodates one LDLD or two 10 frame boxes or three 6 frame boxes

With the board to close SBB

Another 2x4 is screwed to the stand side to close leg openings.