Socrateaser, it seems like unless the CP is the type that will bash my sons' head with a hammer, modifying custody is almost impossible.
If the CP has proven to be extremely difficult to deal with (promising more visitation but withdrawing the promise once I met her conditions), favoring one child over the other, neglecting child's medical condition (making the excuse that she's not a doctor), what can I do to modify custody? You may recall that I was awarded joint legal/joint physical but she gained full custody through "superior strategy" (actually I call it evil strategy).