As always, anything coming from William Optics is very high quality and this doesn’t disappoint. The problem I encountered was with my mount, an Ioptron CEM40, the saddle clamps did not engage the dovetail sufficiently because there is a small step at the bottom of the dovetail that prevents full contact with the clamps. I’m not sure what the step is there for, because most ***** style dovetails are flat angles. With my mount, there was only a very small edge that contacted the clamps which created a very unstable situation with my new William Optics Flourostar 91 to the point it was slightly flopping when I rolled the RA axis to balance it. Anyway, I’m returning this plate for a Losmandy style that is always more stable.