[Flick]

We have Zip Dee Awnings on all of our windows on our 84, but do not have the large patio awning that covers most of the passenger side above those windows...like Clark's on our Guru web page here. I have called Zipp Dee and they have directed me to their measuring instructions. I imagine that the front arm will need to either go between the door and the awning on the most forward window or between that awning's most forward arm and the front tire and passenger window if that makes sense to you guys. Before I do this though I thought I would check with you all (my Newell family) for reassurance, tips and help (see attached PDF for Zipp Dee instructions and side view pic of my coach):

1. Do I find the center line of a structural rib by simply assuming it is a verticle rivot line?
2. It references an awning rail to measure against. I assume they are referencing an existing awning rail for coaches that are simply replacing an awning. Since I adding an awning then does that mean that i need to also find and but an awning rail? If so what purpose does this rail serve is it for drainage of water or condensation on the coach?
3. Then would you assume from these instructions that I am measuring from the center point of the bottom brackets to the top of where I will put my awning rail (see question #2 above) and Zipp Dee then subtracts that 51/2" clearence they require from that measurement..and it appears that measurement includes the contour of the coach.

Your advice and assistance is appreciated.