@rfuss928 and @Marceline had some accessories that you may be able to consider. https://tab-rv.vanillacommunity.com/discussion/17094/cs-galley-peninsula (View Post)
I think the AGM batteries were used in the 400 as they are not easily accessible, so maintenance free is a good thing. Not sure if that area is vented. If not, you would need to add a vent if you int… (View Post)