I'm just about done replacing my roof, and the last thing is adding the A/C back. The roof I have, I'm told was off an '07 Williamsburg, Americana series. It has one brace behind the A/C toward the rear of the pop up, and I'm trying to figure out if it needs just the one or another in front of the A/C. One dealer has said the Alumitite only needs one, but the Filon used two. Another dealer said it just needed the one. Anybody have one with an A/C that can tell me for sure?