I've used nothing but trackballs. There is a stack of worn out trackballs sitting in the corner. I started using trackballs in about 1995 and have passed this on to people whom I built edit suites for. I can edit 16 hours a day with little fatigue and have done so. My idea of using a mouse to edit is the equivalent of a demented maestro flapping his arms around leading a Spike Jones (no offense to the band leader) arrangement.
Did I just miss it or where are the results of which camera shot what?