A question: How does Winscore calculate finish altitude on a cylinder
finish?

Winscore calculates altitudes and finish heights according to SSA
Contest rules 6.7.4.3 and 11.2.1.5.1.

6.7.4.3 If a Flight Recorder records both calculated and pressure
altitude, pressure altitude
will be the primary data source and calculated altitude will be the
backup data source for
flight evaluation.

11.2.1.5.1 When the Scorer must measure a pilot's height above ground
level (AGL),
this height shall be the difference between a recorded fix and that of
a fix recorded on
the ground. For all purposes except finish height, a fix prior to
takeoff shall be used. For
finish height, the Scorer shall use the more favorable of a pre-
takeoff or post-landing fix.

Guy Byars
Author of Winscore