That's a great idea, and it's what I wish I had done before my pop top weatherstripping got destroyed the first few times I used the awning. I did not expect interference. I have since trimmed my bolts but not reversed them due to the way my awning is made, but of course it isn't a Fiamma and I've never seen one up close.
Also, I for one, completely understand the risk of assumption
but I looked at this long and hard and considered making my own brackets, or having them made, which I thought could be done for a lot less than the $150 Van Specialties charged me. Close comparison of all of the pics I could find show them to be exactly the same.
Van Specialties brackets I got (about 2 months ago, Summer 2014)
Z's brackets (best close up pics I could find on short notice, scroll towards bottom of post)
If you haven't read that whole thread yet I would recommend it.