This easel has been with me a long time. Lately the tray has been falling after I move it. Or stuck the next time from cranking down the knob. Gregg cut a piece of sandpaper to size of the back, and adhered it with double sided tape. He sprayed the knob with silicon, for lubricating locks. I didn’t take an “after” picture, but the whole thing is back together and working smoothly. It was a small job for him, and a big help for me. Thanks, Gregg!
