I have no answers for the F-4.... but.... I bought a used shield JUST to figure out how high I wanted one.... the width on most is close to the same, but there is really no way to judge height !!! I would add a piece of blue tape and ride and see if I could see over the shield, kept raising and lowering it till I got the height I wanted..... If this will help anyone, I would be happy to mail it to you as long as you are willing to send it along if someone asks....


Not trying to jack your thread...just being helpful...