So if I grok all this krektly ...

* A start through the top, where the cylinder is never re-entered, is
scored from the exit point. Cool I like that.

* A start through the top, where the cylinder is re-entered for less
than two minutes while on course, is scored the same distance
(assuming no blasting through gaggles).

* A start through the top, where the cylinder is re-entered for more
than two minutes, will get a different start than the one through the
top.

So one has to be careful after a start through the top in the back of
the cylinder. Several thousand feet of additional altitude may be
necessary to stay clear of the cylinder, especially if the first turn
is upwind.

~ted/2NO