From an old email response from S&B tech--applied also to #8 & #9
A7:
Thick bar high: 1"
Thin bar high .25"
Center 36"
Guess on A4 would be 25" center, maybe .40 on the crosshair and maybe 3.5 on the heavy bar. Guessing. If you find out on the A4, please post. Sometime they will send you a great data sheet emailed on the subtensions via a web page request...sometimes they don't...:)
