I have seen the frame with the 820? on it. The frame is great, sturdy and easy to use. The biggest draw back I can see is the limited quilting space. You only have about 5-6 inches and that is with the 820? (the harp size is fine but as you roll the quilted quilt, it fills up the harp area)The 440 I think has a slightly smaller harp. If you just want to do side to side quilting it would work but bigger designs would be difficult.