Hey gang. Here are pics of the Felder-branded F&F jig that I took at a local customer's shop. I had only seen this in our catalog, beforehand. I know that many slider owners DIY their own. Ours is spendy and probably not for everyone but I was pleasantly surprised at the small details. For example, they edged the working faces with some type of PU rubber banding that gives a good grip against the workpiece. The spring-loaded hold-downs are a nice and solid. The body appears to be 30mm birch ply with a UV finish. I would consider this piece "Aigner-grade" if I had do describe the build quality. Just wanted to share.
Erik