I've been thinking about that too. How are you going to deal with the keylock? I didn't want to have to have a seperate key just for the gas cap. Is the bike going to have the original main switch?
I'm not going to use the original ignition switch , just a kill switch.
I used the fitting from the CBR tank but I'm using an aftermarket fuel cap and base so I don't need any keys.
My welding skills were not up to welding the sheetmetal on the tank so I covered the welds with bondo.