I have taken a 1 inch diameter brushed Al knob and made a slipping spindle grip. The system works well, but I need a solid metal knob which is the same size as used by the K2, since I have to drill and tap the spindle support. Does anyone know where I can buy a suitable knob, brass or aluminum. (If this description is not clear enough I can email a 831k .JPG file of the front of my K2) Thanks John G8FDJ