I think I may be the only person who likes using toolboards with delta printers, but I find it really convenient to change between different tools, and for media that is less physically stable (clay), it just seems like the right kinematic system. I had been using a QQ-S Pro for many years, but when I started working with clay more last year, I wanted something with a stiffer frame. When I found the SR on mega sale over the last winter holiday, I snapped up a couple.