I have been taking apart an older t-20 out of an Attex, the ones with the brake rotors on em, and I have noticed some variation from your t-20 rebuild post. Mine had none of the thrust washers in it, like on the 3 planitary gears on each side, there were none. Should I put them in you think? Also I was wondering about when you have the housing empty and your looking down at where the drum rides in the housing there is a brass/copper bushing around the inside of the housing, mine is worn down to the gauge groove in it, is that something that can be replaced? Thanks! Jim