I remember sitting in a a chrome yellow with black interior one on these at the Paris Motor Show in 1995 or 96, and yes at less than 5'10" the sills are definitely a struggle!

Funnily enough I was browsing Paul Matty's site earlier this week and saw this:

http://www.paulmattysportscars.co.uk/showroom/stock-detail.aspx?id=3347

Looks to be a nice example though not as nicely tweaked as yours Richard.

Philip.