Okay, read the instructions first. You have great tips. Note that the drawing contains nicks that align with cutouts around holes or part edges. They are used to align parts in the correct position and also serve as markers for where the toothpicks should be cut. Don't use a blade! Use the clippers to cut the toothpicks. (And please point them away from you so they don't fly towards you!). Use the hand tool included in the kit to remove the pieces from the boards with the least amount of burrs and damage. It is very comfortable! Have an unlit candle ready. Wipe toothpicks with it to insert. If you're having too much trouble inserting toothpicks, you didn't push the pieces all the way in! This is a good test to make sure you are putting the pieces together correctly! It's not always true that you need to lubricate the mating surfaces with paraffin wax or sand when fastening and assembling them properly. I didn't have one on hand and used a candle to lubricate the gears and sides of the gears after assembling the first assembly. Everything worked without lubrication! I then spun each gear and scratched the spark plug between the teeth and on the sides. In the video you can see how everything turns. If the large gear is loose, you will have trouble turning the gears smoothly. So why three stars? It's neutral because, among other things, I still have a few days left before I can finish this project. But all the tips I gave in my review helped me. I got through almost 30 pages of the manual on the first day. A great set if you want to develop patience and tolerance.
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