Chris,
You may want to checkout some other options in Sea Angel's pixs where I have 3 mounted in the cabin - - -
1- on the port side, inside between the rear window & door frame, [access from cockpit]
1- above the Wallas control panel on the head bulkhead, inboard side of head window [access in case of Wallas/cooking fire], and
1- on the V berth bulkhead , in the cabin, in front of the mates seat, under the port sliding glass window [suppliment to others].
I hope to add a forth inside the V berth area later this spring.
All were mounted with #10 SS screws into existing frame work.
I whole heartedly agree with NOT mounting the extinguisher behind the Wallas Stove. When you need to fight that fire, you have to have immediate access to the extinguisher(s). We want to hear more about your fun adventures, not the trials. Good points made by all.