I built an easel when I first started in the
sign business. I made it so it wold hing out from the wall and lay flat against the wall when I was not using it. I was made of new aluminum with a sheet of steel sheet on the face of it. I could hold things to it with magnets and it worked real well for car magnets.
It now spends most of the time folded up against the wall. Since I started working with the Big Squeegee, I do everything flat on a table. I tie one end of a banner down, line up the graphics and mount it in seconds. My back don't get tired because I don't have to lean over it for any length of time.
Mounting long graphics on an easel invites saging as gravity thends to pull the graphic a bit. I mostly had to cut it in strips and mount a lot of little pieces. Mounting on the flat is less of a fight and I mount it in one piece.
My brother tells me that he used the easels for many years because he did a lot of painting. As he got into vinyl he used them a lot less.