My knees and legs get too sore when I kneel. I just use a small, lightweight stool - and sit.
(2011)
We took apart an "antique" one that was past its prime and made a pattern, changing just the overhang length on the long ends by adding about two inches, so that grabbing and dragging would be easier. I have short legs, so the rising from it, and lowering to it isn't much.