I just talked to Felder. $83.00 for new ones. Does anyone know of any cheaper ones. In my defense I did not get any instructions that showed the shims. But 3 years is a long time. I¡¯m more of a tool collector. Lol My K3 has maybe 8 hours on it. Can¡¯t find things I want to build, so I thought maybe some boxes with box joints. I have the incra box joint set I never used as It will fit in the slider so I guess I will try to make 8mm joints. Thanks for your help.