They cut the top off a brand new Demon 170 to convert it to the world's fastest convertible ?! or https://droptopchallenger.com/droptop-demon-170
I'm over convertibles. They tend to be noisy, and the roof needs to be replaced every five years or so. It does look like this particular company does a very good job at creating convertibles. I'm impressed.
When I looking at Challenger's I test drove a convertible done by these guys. It was at the dealer in Leesburg, FL. I will say that I thought it was a beautiful car and the conversion was done very well. I too am past the convertible stage, I bought the SPWB instead.