Yeah the C8 packs some aperture into a might convenient little package.
Pay particular attention to collimation - it's easier than a newt as there is only the secondary adjustment but it's very sensitive when approaching spot-on...and it can make all the difference.
SE QLD makes for reasonably stable thermal conditions for a SCT since the temperature doesn't change all that rapidly, at least, until winter. You will want to devise a cooling solution before we hit peak planetary season. I have the Edge HD 8 with vents that have been fitted with fans and in winter they can be invaluable around dusk when the temperature drops 10-20 degrees in the space of a few hours.
Given you bought a 290, I'd suggest you leave the Barlow out to start with, and practice with getting the object on the very tiny chip at long focal length... I'd almost forgotten how much fun that is
Good luck - and enjoy
