You don't really need the tool. Just lay on the ground and carefully pop one or two of the clips working up from the bottom, then you'll be able to easily see where you need to pry and pull to get the rest of them. I just did all of my trim and didn't break a clip, using a few pry bars of different sizes. You may scratch the paint under there a little but you'll be covering it back up so it's no big deal. Once you have all the trim off and see the shape of the doors you'll realize you'll never be driving an Expedition around with the trim removed. Lots of holes and the door is shaped for the trim. The fender trim and front bumper cover are pretty straight forward too. I removed everything but my rear bumper cover, just popping the top tread cover off it and taping it off. It came out great.
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After: