What tools did you find absolutely necessary? I have a dial indicator and an inch/pounds torque wrench. What I dont have is a press, or any handy means of pulling the bearings off the pinion. I just ordered gears for my D70 and am going to do it myself. I am thinking of buying a bearing separator so that I can use my three-jaw puller to separate the bearing from the pinion. Sound like it will work? I have read the install instructions from Randy's Ring & Pinion many times, and I understand exactly what I need to do. The pressing on and removing of the pinion bearing is the only thing that I am skechy about, as far as having the tools to do it. Any and all advice is appreciated.