I've not let this thread die! I've been busy with work and sorting a car out for my fiancee...
I have remade my circuit, and need to get this onto the phone tonight. I found out I also had a broken wire on my last setup, which was clearly going to be a bit of an issue.
My new circuit is about 10cms long, so will be good to see if this works!
Also, does anyone know if the wattage makes a difference on the resistors? I haven't seen anything yet that say. I am using 0.25w.
Have you guys tried this yet? Or are you awaiting my findings before you have a go?