The LEGO 2x4 brick is somewhat of an icon of LEGO, and the majority of official LEGO bricks can connect back to it. However, the number of bridging bricks required can vary, depending on the piece. Some pieces, like a 1x1 Round Tile, can be connected directly to it; however, others, like the Technic Axle 32, require additional pieces (in this case, the Technic Brick 1 x 2 with Axle Hole) to bridge the gap.
The piece I can think of that requires the most of said bridging pieces to connect back to a 2x4 is the body of the Bohrok Canister assembly, which requires 4 pieces to reach the 2x4: the lid, the hanger clip, a Bohrok ribcage, and a 1x2 Brick With Pin. My challenge is, can you do me one better? What piece takes the most bridging pieces to connect back to a standard 2x4, and what is the chain required for it?
- The piece must be official LEGO; no messing around with off-brand pieces with absurd new connection types.
- All connections used must be legal; no strapping things together with rubber bands and calling it good (that would take all the fun out of it).
- There must actually be a method of connecting the pieces together; pieces like the ball used in Scorpion Palace or any of the BIONICLE canisters without built-in studs are just cheating.