Hi Erick,
Very good report -- good to see the corrector plate heater & stuff etc is working well.
I'm told the Moon has a lot of interesting features through a telescope and I thoroughly enjoyed reading your account of observing the Rima within Petavius.
For those interested, here:
http://www.webcam-astrophotography.c...July-2004.html
is a web-page with a few pics that illustrate this interesting feature. On the face of it, they seem to be taken a day or two after full moon with an apparently similar angle of illumination to Erick's observation.
Best,
Les D