Thanks again.
Yes Paul, that does occur, but not very often
.
31 hours with an AG12 should show some significant detail Mike...oh for an F3 Riccardi Honders astrograph.....one on the way for me soon I hope.
A string of clear nights ahead (I hope the forecast sticks), so it wont take long to get the additional 20+ hours of OIII.
Clear skies
Martin