The client asked for a little time to get caught up as he's in the process of remodeling a new home, so I've shelved the project (literally) for a bit. We actually just had a conversation last week about getting rolling again, so I should be able to get some updates flowing here soon enough.
As to the topic of portal reliability, I can't really comment with any firsthand experience. I'll say that we're about as confident as we can be, given the manufacturer of these boxes operates in the realm of vehicles that far exceed the weight and durability requirements of our application.