Spool holder - under desk

Hello World! I designed this Spool holder to be mounted under a desk of 2 cm thickness. It doesn't require drilling the wall and the weight is absorbed by the frontal hooks. Each side of the holder is made up of 3 pieces: Bottom: is the larger piece that will hold the 2 wood cylinders of 25 cm Up-front: is screwed with the bottom and contains the hook Up-back: will be screwed with the bottom and contains two holes, to be screwed to the desk. This piece can be printed together with the Up-front. The list of materials needed for this holder is reported below: 4x Threaded Heat set Inserts L: 3-8 mm M34x M3 screw L: 25mm (to connect the UP pieces with the Bottom) 2-4x wood screw M4 L: 20 mm, to connect the Up-back pieces with the desk (you can use just 1 screw on each side if the length of the staff is <=