Thanks for the pic and info. I do feel like that space is too valuable to use up for a propane locker when there is so much unused space under both cockpit seats. I'm going to be out of town this weekend, but I plan on going down to the boat next week to take some measurements and try to sketch out a plan for the locker.
Looking at your picture did make me realize that the best place to put the locker may be on the starboard side right next to the lazarette since the galley is also on the starboard side (though that makes me wonder a little bit about weight distribution since that lazarette is filled with so much stuff already - especially compared to the starboard side).
I'll keep you updated on my progress - let me know if you get anywhere with your project =)
btw - I'm in the SF Bay Area - where's your ranger located? I'd love to see some other rangers.