I had a rigor rabbit for a while and did not care for it. It just did not have the "rigor" i wanted...i returned it and went back to the old coonskin cap hanging in the brush.
Yours has the plastic can inside with the motor and spinning weight? That's what mine was and it just vibrated around without much real motion.
As I sit and glass, which is common for hunters out west, I have sort of quickly discovered something I never learned when I was younger.
In my youth I had enthusiasm and spirit. In my middle to advancing years I have creaky knees, arthritis, and I tire more easily than I used to. Where I used to sit on the cold hard ground I now look for that soft spot to sooth my tired muscles. That leads me to my tip.
Carry your soft spot with you!
In my pack I carry an air filled, ultralight, camping pad....