I've thought for a long time that the usual 038 or 049 battery fitted to Scimitars is only just big enough for the job, so I decided to see if a larger one could be squeezed in. Measuring around the battery tray and looking at http://www.tayna.co.uk/car-battery-wizard.php
I decided on an 072 size. Some bodywork was needed - this shows how I cut the inner side of the battery box -
and a small hole in the wheelarch -
I turned the box side upside down and fixed it in place ready for glassing in..
This was a 6a, I've now also done a 5 so I'll post photos soon.