Hi Merlin,
Some great information there, thanks!!
Can I ask, as I have a Skywatcher ED80 and the modded PST won't come to focus, is there a way that I can work out whether a telescope will allow the required 200mm inside focus before I buy it

?
It would be good to know what I should be looking for when I am surfing around for a scope that is actually available in Australia!!
Thanks
Daniel...