I managed to finish up the battery holder today. I made the side angles drilled the holes then primed all of the parts. I hung a new ceiling fan in the bedroom while the paint dried. I riveted all of the parts together and gave it a test fit, you can see in the picture where it will go in the baggage compartment floor. I need to get some shorter bolts, the ones that come with the kit are meant for a taller battery.
