This device holds a sponge stationary in the overflow hole (22mm round) of our sink so I a one armed person can wash my grubbys (hands alternate). Looks like it will work well with initial tests, true test will come when i get greasy gross after working in the shop. as always all adaptive files are free I just ask you don't profit from my work. I have added the freecad file so you can modify as needed to fit your sink. here's the video that shows the process and how it works. https://youtu.be/pjZQTbdHAOw