ha

cheers Chardie - I was worried too about breaking the camera but I've had it a year now and I'll follow the instructions as you say. Hoping to get it set up within the next week or so so watch this space! Arduino sounds a complicated, though possible(!) option too, I've a pi to work with, I've seen pi timelapse projects on their own without an external camera, they look pretty cool too;
http://www.raspberrypi.org/waterproofing-your-timelapse-rig/
another project to consider! looking forward to getting into it, haven't planned where to timelapse first - guess when you're working with a Canon you need to be there to babysit/guard it. I'll have a ponder!