My tank bag is a "Joe Rocket" that I had sent out from the States, but you could use any tank bag Rob...............the fittings are all available from Powerlet and it's just a matter of cutting a hole (I used a heated knife blade) in the bag + 4 holes for the small bolts to go through, and there you go!!
PS: I heated the knife blade to red hot and it just sliced through the bag and the lining and sealed the fabric as it went. Did the same to make the holes with a heated spike (could use a heated nail)................that way it keeps it all neat and tidy.
It only took me about ten minutes to fit it!! I ran the wiring direct from the battery under the tank and was able to do so without taking the fairings off.....except for the small one that gives access to the battery.
Nice one Couch
What tank bag and where you get im investigating for maybee a coms set up ect