I'm working in premiere pro on a macbook pro and using a logitech M570 trackball. I have problems lassoing clips in the timeline - they don't catch, lose the lasso when I start to move , and am too often it just doesn't work. (sometimes when I zoom in very big on the timeline it works, but not always.) When I use the mouse pad on the laptop - which I don't prefer - I don't have any of these problems. Has anybody had this problem? know how to fix it? can recommend a trackball that doesn't have this problem.