I did this short anim test with Manga Studio 5. MS5 is great for just about everything but there's no animation timeline so doing onion skinned flipbook anim isn't easy. I'm looking for a good alternative (that doesn't cost a fortune). I did see that the new Autodesk Sketchbook Pro has a timeline and I'm tempted to get a license so I can play with it, but I really want to avoid "renting" software. Maybe Anime Studio? I realize there's thinks like Synfig, Flash, etc., but they seem to be bone based. Sketchbook Pro, I'm thinking, is the way to go.