I retrofitted my Juki 1181n with the 1 hp Consew servo motor. The entire process took under 1 hour. Worked from below the table. If you’re retrofitting use all of the bolts, nuts and hardware included. Consew has a RU-vid on programming the controller. I just used the motor to sew up a skirt for my kayak. Needle and speed control is great. Perfect for upholstery and heavy fabrics.