Review on Line UGears Models Wooden Puzzle Puzzles: Crafting Your Way to Enchanting Mechanical Masterpieces by Douglas Berry

Amazing Model. A very nice structure. A few assembly tips: Sand all sheet metal before removing any parts. I used 400 grit sandpaper first to smooth out the fibers and then 1500 to give the surface a shine. After removing it I sanded the edge faces but not the serrations. I didn't use wax, but I used graphite throughout. No. 2 pencil rubbed brilliantly on the mating surfaces gives a very smooth surface and does not increase the thickness of the details but may stain. This kit contains many additional parts. If you break something, check the blades for replacements. #6 is a bunch.