[Greg McKaskle]

I don't think that will work. You are flipping the value every time it is called, so it will oscillate.

My post on flipping the proportion really is the thing you want to do. What I didn't tell you to do was to find the other places that are adjusting the position and negate their X value as well. A good example is in your Lost-Edge case. The 7,-5 also assumes a certain mounting. Constants like that also need to be negated.

Greg McKaskle