All of you guys over 60 have more money than you know how to spend. I'm only 54 and not as wealthy as you fellows but i do have empathy so I will share some knowledge to help you with your knees.
If any of you appreciate my sharing of this knowledge you could probably buy two for a better price and give me one, you know, to show your gratitude.
https://youtu.be/4d69VmX45qw