how are you suppose to hold together and take apart, each panel probable came in/out of the car 10+ time to fit it and panels around it. screwing a box together is fine, if you predrill your holes with counter sink, you wont spit the wood, the screws or nails are there until wood glue dries, they do the same as clamps. i prefer finish nails, you disturb the wood less, and i think they are stronger, as i have ripped apart many screwed boxs with ease and nails hold like a crack hore on a rock.