Kev! That's a great first effort , well done
You've handled the core nicely.
Bruce, Its definitely worth getting the Backyard EOS program to control the Canon camera. As Kev has mentioned you can focus using the programs live view mode. One thing I do after focusing, is wait 5 to 10 minutes to let the sensor cool down. It heats up very quickly when using live view.
Your pics on Astrobin are great