I gave up on the other method as it was insane and the pixy method in it's simplest form has worked out in the end to suit me.

I could tell you the story of why I used the other method to begin with, but then you might end up as confused as I was. Suffice to say I had used it before and it worked perfectly and had all the built in grippies for pixel precision, but when a glitch came it, it was much nastier to troubleshoot for sure.

This method is leaner, more elegant, it's actually capable of precison that I thought it was not, and there's no flickering that I notice (one of the original drawbacks of this method I had thought?!).