Quoted from Rarehero:Actually the pegs replaced the service rails with Iron Man in '10
The "Pegs" instead of Service Rails started on the latter part of the BBH run.
Some BTDK had them as well (+ the cheap plastic Aprons) then IM had both (Pegs & plastic Apron's).
I've seen 5 BTDK, 2 had Service Rails & metal Aprons, 1 had Pegs & metal Apron & 2 had Pegs & plastic Aprons.