Because of the hype around "Lightweight" cars, i think the interest about the definitive numbers will continue. All i can say in addition to what i have already stated is this, the cars i have shown in the on-line list the information comes from three places. Firstly, the copy of the AC Build book the Club holds, secondly, notations against a chassis number made my previous Registrars and thirdly, from the photographic records of the cars the Registry is slowly building.
Again i state, the Lightweight, is a MkIV variant, a version based upon a basic format and which varied dependent upon the Country it was being sold into.
The standard MkIV long-nose is the car from which a Lightweight is derived, it is also mostly certified and legal for sale in the Countries where it was built for. It is the Lightweights early shape and lesser specification that seems to appeal, however the early CRS models have the same bodyshape as a Lightweight, as the body of one was used for the buck when the Carbon was laid up.
However, things are never clear with the Cobra, as there are three variants of the CRS body shape, all subtle in difference but different never the less. To add another oddity into the mix, perhaps we could discuss all the early build CRS cars, year 1999/2000 manufacture, having 302 engines produced in 1994.
It still comes down to this, a low volume car manufacturer would sell what ever the customer wanted, as he had the ability to change the cars to meet any requirement/request, body-shape, colour, engine, trim.
For this reason alone, until the Club has photographs and details of every MkIV built, things will change.