As much as I love the 1959-60 wraparound rear window of GM's 4-window hardtop sedans, but the '61 Caddy was a bit more awkward. Besides my beloved wood paneling, I subtly changed the C-pillar. I widened the painted portion, and lowered the greenhouse a bit. The rear window is now a Mercury/Lincoln-like 3-piece affair, with a central section that lowers a few inches. I did this imagining that the 3-piece window became a fin-like fad after Lincoln's '58s, and by '61 Caddy would have fielded one.