Just now seeing these posts and I am ordering today! By the way, the efficiency of the battery free piezo models seems to decrease with altitude. Now, I don't know the science behind that statement but it is a pretty well accepted fact among those of us that frequently camp above eight or nine thousand feet.
Since these things are so relatively inexpensive, it is amazing that most rv stoves don't have them already installed from the manufacturer.
Thanks for the original post and most of all for the pictures of your installation.
Paul