Well, thanks for all the info guys, and did I learn heaps over the weekend?
You bet I did!!
The first thing I learned was I need an inver-thing-a-ma-jig!! Canon seem to have one for about $279 plus shipping, or I can find some on eBay, however, they are all ex-USA. Might cost me about $100 to my door, however I have not asked them about shipping to AUS. Any tips on local aftermarket products?
The second thing I learned was dew control will be highly likely!! It is very evident in this short one I had the chance to make.
When I work out how to get it down to web size, I'll put it for comments and advice.