Here is a camera rig I made for C4D that uses xpresso sliders to drive GSG signal tags attatched to a C4D camera rig's PSR. You can just change some sliders and boom it animates on that axis forever. Want to rotate around a product, just move one slider, no keyframes. Then add in a z-roll, one more slider. Jib up... yep just move the slider and it will animate up. There are also sliders for the initial position, which I find is really nice for finding shots of sheet metal or really any product.