I have an old Tasco propane stove/oven but the oven doesn't work and I've been thinking about this mod. Just wondering why you made this change. I like your idea but is the acrylic strong enough? Lexan would be a better choice.
I love the Origo stove. You'll sleep better of you get the propane off your boat and you can use the propane locker for something else.
I've found the alcohol from the hardware store perfectly acceptable. The expensive stuff in the marine store says "Super clean and low odor" but I think they might be talking about the lable instead of the contents
I could have gotten Lexan for 4 bucks more but it's softer and I figured the 3/8" acrylic would be strong enough and look better after a couple years. There is a 2 1/2" thick wooden rail on the edge of the shelf which will take most of the strain of stuff sliding inboard. This is probably going to the be the snack and bread locker. I don't expect to put cans and other heavy stuff in it.
If it does break I'll just replace it with Lexan, under 30 bucks (includes cutting to shape and rounding top edge) and 45 minutes work to drill and tap the holes for the hinges.
These guys are a great resource for anything you need in plastic for boats:
http://www.marineeco.com/
They made up my whole storm cover set (10 ports) for under 150 bucks.
http://www.rogerlongboats.com/09Portlights.htm