I am a newbie as I have only been an RV owner for two months -so bear with me. I am wondering how I go about measuring my 1990 Toyota Dolphin for an awning? There is a track up there, but I am not sure if it went to a past awning or if I can use it for a new one? What are the dangers in buying a used awning like off of Craigslist or similiar sites? I dont even know where to start but I did look at a couple companys websites and the ones I looked at were VERY pricey, so if I paid that much I would want to be sure that I got a perfect measurement, a great warranty, etc. Any feedback would be appreciated, even if it is from others in the same predicament