I finally figured out a solution i am happy with.
The tank mounting was pretty easy tbh i got some thick rubber hose and sliced it down the middle to fit the front mounting point. Then for the rear mount got a bit creative lol.... i used a 50mm bolt lock with spacers and the original retaining loop. Actually works really well everything fits well with no movement.
Then the electrics were a bit more tricky. I put the starter relay and flasher relay upside-down, just under the frame. The voltage regulator was relocated under the seat, just had to extend 4 wires. The ignition control unit is mounted where the coil was mounted.
As for the coil i relocated it near the end of the tank. I want to change the coil as it is very bulky, i was looking at some dynatek minicoils. Does anyone know the primary resistance of the original boshe coil is??
Cheers for the replies......