This has been a great thread - very informative. Good to know what places work. I have my halon bottle on the top of the tunnel cover, well forward, under the panel. I've always been concerned that it might be too close to the fire, so I got a small foam-type attached to the carpet with velcro, between the seats, to regain access to the big bottle.
But, now that I know the small halons will fit in the front seat foot wells, out of the way, I plan on a couple there, as well. Also, I like smoke hoods - they give everyone something to do. I noticed a new stye when I was at Aircraft Spruce yesterday:
The price is the same as the factory (and everybody else), so it must be a fair trade item.
By the way, what do folks think about the Billet-style mounts? I don't see much use for them in an RV-10.