Mine is a 1996 Ultra Hawk 26 inch. The lower blade clamp is simple once you do it a couple of times. There's a hole in the accessory arm the same size as the roll pin in th blade clamp. You loosen the thumb screw take the old blade out then put a new blade into the lower blade holder then put the roll pin in the blade holder into the hole in accessory arm hold the blade straight then tighten the thumb screw. It takes about 5 seconds to do this once you have done it a few times. Total time for me to change a blade is probably about 30 seconds. It is a bottom feeder if that makes any difference to you. I have never tried top feeding but it looks like it would be a pain to do. I like my Hawk and will probably buy another one if this one wears out.