I just started mine over the weekend. After counting, it appears there are 159 parts to the clock. Some of them can be, and many of them should be, cut on the table saw to guarantee straight edges and 90 degree angles for proper fit and alignment. The instructions are very detailed and clear; I anticipate no problems. I bought both the sound and light kits. With plans, kits and wood, I'll have about $200 in it, but I think it's going to be well worth it. Did I mention I love trains? LOL