Attention All.
Envoytheguy I did indeed re install the unit and triple checked for loose wires. That was DuffyFD's problem.
I wrote to Hanzo Racing and they wrote back, coming from the black box is a wire that is looped, you can clearly see it in the photo. The blue wire is for connection to reverse light, if you so wish.
I cut the looped wire and hey presto it retains it's settings. This has changed the E Drive to a must have, cant live without device.
I find myself using power 2 mode and am having loads of fun playing with it.