"Umkehrwalze" Master parts in HDSL (the Reflector)

HDSL, ...High Definition Stereo Lithography, makes Master parts from AutoCAD STL.

Umkehrwalze HDSL Master

Front view of the Umkehrwalze master.

HDSL masters are 1/2 percent larger
to allow for casting shrinkage.

Rear view of the Umkehrwalze
HDSL Master

Note the 'C' on the side which corresponds to the use of a
'Gamma' Rotor to the right.
Different angle
Rear view of the Umkehrwalze
HDSL Master.

Note the 'Cam lobes'