Ok so I’m totally bummed right now. The battery was a failure.
It didn’t fit in the deck! It was too tall and would have put too much pressure on the battery and the lid.
In addition to this, the connections were not great. As there was no flexibility in the connections, it would have been very easy for vibrations to work them loose or cause them to arc.
Sometimes you gotta know when to hold em and know when to fold em. This is a fold. Tore the packs down and it will now go together as a solid pack 
There is still a lot of good information here, but just don’t follow the design 