The 2-D also had matched extension tracts. Typically there is a number on the
short base on the backside where Kodak or the manufacturer for Kodak stamped a
three digit number. People on the "*bay" sometimes offer the rear tracks. There
at least 2 types. One has 2 dowels and a center screw. The other has 2 ~3/4
inch plates just inside focusing tracks. The plates are bent up at the end of
the track and mate with female style plates on the short base. In the center
is a spring loaded key which you push and twist to lock the extension to the
short base. This type of track has a reverse groove on the track. Looking at
the short base back should tell you what type you need to look for.
In the case of the dowel type tracks one track may fit another camera as is or
the dowels made need a little sanding . Worst case is the dowels need reseting
and the holes on the base need filling and redrilling so the tracks line up
properly.
DL