Its a good piece, well made. There is not a center stud like you stated but adding one is not a problem if so desired, it can be made to fit tightly against tank it is adjustable on the end that attaches at rear of tank. Mine has been speed tested to beyond speedo. Blinker may touch at lock but when you are at a lock you are stopped or very slow and it has not messed one up that im aware of. These add a great look and function, cool unobstructed air flow. My experience here:
OzClaw for Touring - 1st one made - now available