Yes, a cabriolet has a folding top with a lining and headliner, so inside you hardly notice the difference between it and a coupe, and a convertable is just the outer layer over a frame (like most domestics). One of my old ads said it took, I think, 2 and 1/2 hours for 3 or 4 workers to install one Ghia top. It took me about 2 and 1/2 weeks! :p