I met Ben and David Smith and saw Retractable Prototype No. 2 at the Mustang 35th Anniversary Celebration at Charlotte in 1994. The car was eggshell blue, with a black top & black standard seat interior. It might have been a 6 cylinder - there was no engine badge on the front fenders. The car's license plate said "CTHETOP" - that sums it up rather nicely.