Well you're almost ready to assemble the new panel but first gently clean the bezel with some metal polish and repaint the hood. Use some wax and grease remover on the hood, sand the hood with 400 grit and then spray with SEM trim black. Use a black magic marker to black out the cut edge of the carbon fiber of the lightswitch hole and where the vent opening is. Repaint the trim bezel for the lighter that screws on from the front after the panel is installed into the dash.
Now lay the bezel, CF facia, and modified original facia on the bench and use clamps to hold it into position. Gently bend the tabs over that hold the bezel to the facia. It's important to make sure the three pieces are tight when you fold over the tabs. Take your time, be very carefull, and don't screw up! You only get one chance! Rebending the tabs again will probably break them off. GM only designed them to be assembled one time. If you should break off one of the tabs carefully cut a new tab with a hacksaw blade close to the broken one.
With the tabs folded over stand the facia assembly upright and you'll notice the pop rivet holes where the hood attaches don't line up quite perfectly anymore because of the thickness of the cf facia. Use an awl to widen up the hole in the bezel so the new 1/8" pop rivets will fit. Do not make the holes any wider than necessary to insure the bezel , cf facia, and original facia stay squeezed together tightly. Then place the hood on the facia assembly and pop rivet the pieces together with the 1/8" rivets. I add a couple extra rivets in top areas around the bezel before adding the hood to make sure everything stays tight and you're not counting on the (now weakened) fold over tabs. Be cautious on placement of the extra rivets as they may cause an interference problem.
YOU NOW HAVE A CUSTOM CARBON FIBER DASH PANEL !!!!!
