This particular design is easiest to build with a laser cutter, but a jigsaw or other cutting aparatus would likely work just fine.

I recommend reading through the instructions before making any cuts to your material. Many parts of the design are variable and depend on your specific matierals and setup.
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Step 1: Cut pieces specified in cad design out in the material of your choice

I used some ~eigth-inch scrap wood for the phone seat, and quarter-inch acrylic for the mount. (Note: All interal cuts are designed to fit these materials. Please adjust these to fit the material you are utilizing.) If you get any burn marks on your acrylic, Acetone works nicely to remove them.

Step 2: Assemble the plastic mount

Locate the two "prongs", the "car_back", and the "hinge_mount". These are the main components of the mount. When the device is installed, the car_back will be flush with the exterior of the car's compartment, with the prongs pressure-fit inside to hold the device in place. (Note: These pieces are custom-designed to fit a Hyundai Accent. You will likely require modifications.)

The prongs and hinge should fit snugly into the car_back, and can be held in place with SciGrip Acrylic Glue (16). On the opposing side of the car_back, glue the hinge snugly into place. (Note: I set the holes in my car_back off to the side to provide access to my car's volume controls. You may not need to do this, and may prefer to cut these holes in the certer of the car_back.)

Step 3: Assemble the wooden seat

The wooden legs stack up to make the sides of the seat. I used generic wood glue to fasten them together, and to fasten them to the back of the seat. Next, glue the legs_front pieces to the very top of the stacks. Set these with C-clamps to dry.

Step 4: Attach the rest of the hinge

The two "hinge_seat"s fit snugly into the back of the wooden seat, facing backwards. I used a long, thin bolt (+nut) to hold these pieces together with a loose fit, with a small rubber washer in between the acrylic pieces, to keep the device from swinging loosely.

Step 5: Reinforce the wood

I drilled and counter-sinked (counter-sunk?) a few holes into the legs, and added half-inch wood screws as an extra reinforcement, as the "legs_front" pieces are essentially what are holding your (large and heavy) phone in place. It can't hurt, and they look quite nice.

Step 6: Finishing touches

I added mahogany wood stain, to make my scheisty wood look a bit more like nice wood. I also considered laser-cutting sweet designs into the wood. You should! It would look awesome.