So, I am really pleased with my MS400 acquisition! I ordered part no 1122-640-1711 which is the large clutch cover for the MS440 and includes the outside felling spike and all internal rubber and the roller chain catch. Everything fit fine although I had to modify the outside dog a bit to fit on the 400 case. I also ordered the Inside dog for the 440 which I thought would be a match. The inside dog is slightly smaller than the outside dog and the roller catch holes do not line up. Did I need a different inside dog? Concerned that since the projection of the inside dog is "shorter" that the saw will not bite correctly and cut crooked. What is my remedy? Thanks for any help or suggestions! Ed