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I looked at your pictures and it all looks fine. First test would be to remove the pallet fork. Then wind up the spring a little while holding the escape wheel. Then release the escape wheel. It should spin out rather rapidly. If it does not, then your gear train has a problem. Second, with the pallet fork removed, test the balance wheel. Does it oscillate back and forth freely when you give it a start? One thing I did notice is that the screws are set pretty tighly on the balance wheel frame front. To start, you can remove those screws...they are not critical at first. With the pallet fork replaced, does it rub against the impact pin housing? The closer you are to the balance wheel, the more sensitive you will be to friction. Last...when you set the thing on a planar surface, to all of the brackets lie flat on the surface? Does it bow upward? I found on my first printing that, due to elephants foot, the brackets where causing the whole structure to have a bow upward which significantly increased friction/binding in the gear train. It will work...it is a brilliantly done design.