Ask and you shall recieve! (Flip Top Gas cap Adapter)

Put me down for one. My buddy has a different kind of setup I was going to try but this looks easier to do. One thing is the unit looks pretty close to the quarter panel. My concerns are either the locking tab or the hinge tab rubbing the quarter when used. How much does it clear by and can a set of 'spacer 'washers be used just to allow a little extra 'comfort room'? Thanks.
Chas.

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