Iam sorry iam having a very hart time by trying to take off the rear brake drum even when i follow your intructions iam using the hummer to nock the drum to see if is stock i using the very thining flat screw driver in the back hole that is located backof the drum is very hard to see the only thing that i feel is the noise of the spring my question is to know how is the best possible way to take this drum with out making any damage