As a winter project I want to replace the axle bushings and pins on one TO-20, and two TO-30's. I would like to order all parts without taking the front axle's apart. Sliding a ruler into the hand crank hole I get 4 1/2 inch on all,(tube section only). 3.Do you measure the total length including the flat end, or just the tube section. Also the locking bolt on all 3 are different. On one TO-30 the bushing end looks totally different. It looks like it has a flange and a washer. I only see two listing in the parts section on this site. The master MF book shows 4 different axle pins. Can anybody help.