This is sort of on the topic.
Not my sewing desk/table, but my "other table," can be raised and lowered! My personal creation: ta, ta: an inexpensive table and exceedingly elegant concrete blocks and assorted sets of wooden blocks (when needed for more "up and down") to fit the number of legs to raise and lower said table.
Think of the possibilities. No having to get onto someone else's creation list. No having to satisfy anyone other than yourself (your sewing place, your pick). No needing help to accomplish the up and down motion. And "right this very minute" for "when?". And on and on.
Yesssssss followed by hand pumps!
Pat