Nearly there Monster Man, it had more than one wire so I am stumped
I have made a new dash retainer out of 1 inch plate so it didn't break

(going for my heavy road users now

), the unit is 80 mm dia and 30 mm deep so it is very compact.
I fabbed the holder retainer from 3 mm alloy, did a brush finish to give it the expensive billet look and it is off for anodising, it has shitloads of function but as yet I am to discover the operation of all the bits.
Will get some pics up soon, just been crook with the flue and it has been -5 deg C outside so progress in teh last coupla weeks has been slow.