My Master cylinder on the 57 150 is leaking and needs replacement. Since a brake system in good condition is essential with the single reservoir. Besides replacing the master cylinders and bleeding the wheel cylinders units will be necessary my plan is to be prepared to replace the wheel cylinders and brake shoes. I have brake shoes but I am not sure if they are right size. The FC uses 11" shoes. How can I measure the shoes i have to determine if they are the correct size?