2015 Update
During the Xmas holidays I finally get time to work on my own project, and this year I was able to get quite a lot done. The left side bodywork is now complete, and to a reasonable standard (close enough for prototype work). There are some minor pieces at the rear that I have left off but these images should help everyone understand what I have been trying to achieve.
The lower side door slides on three rails (two are visible) to allow access for the driver/rider, including putting feet down at stops, and the top section (which does not yet have the full canopy) moves up and down by hydraulic control. All switches are manual at present but I'm planning to use an arduino for more accurate control in future. I plan to do a youtube video to demonstrate this working soon.
Most of my work on the project now, is directed at getting the vehicle registered in time for the spring riding season - there's still loads to do but I feel that I've "broken the back" of it now.