Hi, do I need to buy another video head just to do 90 degree (vertical slides) on my tripod. Is there a simple swivel bracket or something to rotate the slider. I'd like a head on top of the slider for pans/tilts. Seems like unneeded weight, height, functionality and cost using two when all that's needed is a one-axis adjustment on the bottom. Its for a small m4/3 camera. Have a great day.