@Shades-of-Oregon , mine isn't Nearly that fancy, and the seat I refer to is my gardening seat, that I will probably Never use to kneel on, even though you can flip it over to do that.
You know, it's a really good idea to have your spouse go to Dr. appts with you. You cannot remember everything that is said, and the 2nd person helps a LOT.
Like when DH had to have cataract surgery and he was SO GRATEFUL that I heard the dr. suggest better lenses.
Also, I have found out that not many people who spent more on bifocal lenses are really happy with them.
He needs lower level readers than I have--although getting my eye glasses prescription from June filled is on my to do list this week--and we can pick them up at $2/pr at the local grocery store.
I know. I have a stash, in the back room, in my purse, on the porch, in my car...
Anyway, somebody who has successfully had 2 new knees told me yesterday that the dr's Don't want you to lean on your knees. I tried with my right knee, kneeling on 4 inches of hay, didn't hurt, just felt Weird!

What I was told was the some people find this uncomfortable after healing and choose to use HD knee pads, and that is my intention.
The game of "telephone" is alive and well!

Also, I can sweep the carpets leaning on it.