I have been involved with a company that is producing a single seater GSXR1000 based super trike. Using what we have learned from 'playing' with the trike chassis and my grass track back ground I am toying with building a single seater for track days and hill climbs, basicly a 'locost' formula ford. It's some thing I'm considering but it will have to wait as I still have a 60x60 barn to fab and erect and a few other Roadster based products to get developed. The saying 'so much to do with so little time' springs to mind.
Who knows I might even finish one project before I start the next, one day.
I think MK have the right idea as it's the same basic shape as the Roadster and still uses easy find parts.
www.mkengineering.co.uk