All four mounting plates are identical. The two inside plates mount to the saddle with a single screw and no modifications to the mill. The two end plates mount to the mill with 1/8 inch bungee cord and cord locks. You can use plastic or aluminum material for the plates. I used .125 inch black styrene for my plates.

For bellows material I used white "sew-in interfacing" material which is available at any fabric store. Interfacing is made of man-made fibers bonded together to form a paper-like sheet. The material I bought was about .012 inch thick, product name was "pellon 884 cut-a-way stablizer". I tried other bellows material (ie: plastic sheets, fusible interfacing), but this material was easier to work with and still maintained it's shape after folding.

Here are some caveats for building the bellows.

• Download the bellows cutout .pdf file.
• Cutout two 12x8 inch sheets of interfacing.
• If necessary iron the sheets to make sure they are flat.
• Print the .pdf file on each sheet as actual A4 paper size. I used a standard HP LaserJet 1320, bottom paper input bin.
• Using the video as a reference take each sheet and score each fold line with a ball point pen on a soft surface. The scoring will make the folding much easier and more accurate.
• Cutout the shape of the bellows template using a x-acto knife.
• As shown in the video make the appropriate folds on each sheet.

Once you have the two bellow covers built attach each cover to two end plates. I used DAP clear silicone rubber sealant for this procedure with good results

Here is a view of the front and back plates.

Here is a view of how the front inside plate mounts to the saddle. Use the 10-32 socket head screw that holds the table lock assembly. Don't over tighten this screw or you will lock your table.

The inside plates are connected together with two 8-32, 3.5 inch hex standoffs. One standoff for each side of the saddle. To make one 3.5 inch standoff I used two smaller standoffs together. A 1.5 inch and 2 inch (McMaster-Carr #91780-A202 and #91780-A204).

Here is a good view of the bungee cords used to mount the front plate to the mill. I used a cord lock with the bungee cords so I could easily attach/remove the plate later. The back plate was mounted in a similar manner.