Just an update with some images.
As mentioned above I fitted the new Reg/Rec in the standard position, laying on it's side and attached to a larger Aluminium plate to aid cooling.
I didn't like the Charge monitor lamp in the ignition switch surround where I first put it:
So moved it into the position of the original charge warning light in the standard warning light block.
It glows Orange when the ignition is switched on:
And Green when the engine is running.
Unfortunately the battery is still discharging itself over a few days.
Looks like I need to splash out on a Motobatt!
Nasher