I just completed building my craft table, model 421420. It was fairly easy following the step by step instructions. However, on page 6 of the instructions it says to place the L brackets on part A. When it came time to mount the table top had the L brackets been mounted on the back of the table top first, then attached to the A sides last I would not have been standing on my head to screw them in. Other than that it went great. By the way I am a 72 year old female. I am not carpenter trained.