At first glance I would like to add jacking plates to my car rather than make a custom jack saddle to fit the contour of the bottom of my car where the "frame" is located. Seems the pads would be easier. The saddle would be some type of convoluted "U" shape that would capture the "frame".

But then again if I had the custom saddle I would not be carrying around the extra weight of the plates and theres no way the jacked car can move around on the saddle.

Does that count as 2 birds with 1 stone?