Hi Martin,
I have a serious case of OCD and when I want to do something a certain way, I can literally waste hours trying to make it work. I may end up going the intervalometer direction but I'm trying everything else first. You're right that the frustration is just in the fact that it should work and doesn't, all for the sake of a damn cable that the manufacturer of the mount doesn't even sell themselves. In an attempt to make my set up work, I did actually resign myself to downloading BYE only to find that canon don't make 64bit drivers for my older canon 5D
More wasted time and effort
Ryan