Ok everyone, I need some much needed help. Been carving Union Stars for about 2 mo. Recently though the results have ben less than satisfactory. A lot of the stars around the edges are not the same size as the inner field. Have email Julie from Inventables and have tried all of her suggestions. Checked the belts, pulleys, set screws, ACME screw. Jogged the Z Axis up and down 1" to if it actually moves 1". Waste board is flat. Replaced some V Wheels. The results are all the same.