Update 2: Pulled a new set of .cpp .h and the demo sketch from your website, the only change I made was channel input number to 8 as that is what my setup is spiting out.
Exact same result, if I wiggle the steering quickly the throttle bounces all over the place.
Any idea as to what it could be? (to be honest it is probably me doing something wrong)
I have been over on the multiwii forums and one of the guys has made a ppm in servo out lump of code from multiwii. As a test of the hardware I'll set that up and see of the results are the same. I am hopping to use your code though as it is far more flexible and easier to work with.