This site describes the transformation process of my 1970 Citroën ID20 from berline to convertible, and the upgrades that I added during the last 15 years.

This is the result:
The basic rebuild was done by Oord DS cabrio, in the Netherlands (Zwaag).
After the basic rebuild was done, I chopped the car further down at the rear and mounted a new collapsable roof from an Audi80 cabrio (early model), be it with some alterations.