Something else that happens after years of repairing mistakes is, a different mentality towards planning. I guess I reflect on mistakes more now before the projects begin rather than after. It allows me a clearer plan of the small steps. For instance, I made a big mistake on my box for the contest. I applied my glue to my sub straight and stuck my veneer down. I then put it in the vacuum bag, veneer face down on a piece of 1/4" thick aluminum. I had sanded some glue off the aluminum plate earlier so it had the scratch marks from the sanding. When I went to remove my piece, the glue had bled through the veneer & stuck to the plate. When I tried to separate it, it split down the center of my sub straight leaving 1/2 the veneer broken & stuck down. I now know the next time to cover the plate with aluminum foil before putting anything like this in the vacuum bag. A high price to pay but a lesson well learned.