Just got my Diamond NR22L in today. I currently have a wilson 5000 roof mount and the antenna is holding up pretty good, but i don't know how long it will last. So, i am on the hunt for a custom mount or a 5" diameter washer as a backing plate for the inside of the roof. I found these but i dont know if its the right way to do this.http://bellsouthpwp.net/b/r/breedlove1/page28.html i DO NOT use mag mounts, and want it on the roof. so a hitch mount is not an option. Give me an idea what i can do. thank you.