If you have one of these A-Frame studio easels you are also probably familiar with the tendency for the easel tray/support to wobble when you are painting. For years I tried all kinds of fixes, putting in way too much thought and creativity into something that continued to frustrate me. And then came an idea so easy a caveman could have thought of it: I used wood shims. Now it's easy to adjust my height and get a stable work support each time. Duh...
