Gday Ron,
. Yep, per Liz would check collimation first but I think in Sydney (depending exactly where I guess) seeing isn't going to be that fantastic. Living in the Inner West, for me isn't an ideal location for observing but on a clear night after 11PM or so things tend to improve somewhat.
Don't forget to use the mirror fan to equalize the temp of the scope i.e. minimize tube currents.
cheers
Adam