Review on Wood Trick Mechanical Assembly Constructor Puzzles ~ Brain Teasers by Kenny Marozas

I enjoyed putting it together and seeing how it worked. There are some details like the fenders that should have been done last. I recommend that you spend some extra time grinding the gear teeth, pistons and heads as they need to be very smooth to work properly. Mine didn't run as smoothly after a full build, so I'll take my time next time. The guide, which shows diagrams for different techniques (grinding, cutting, breaking), is the only part of the guide that contains words of explanation. There are pictures and numbers in the instructions, that's why I only gave 4 stars, and also because of the easy assembly.