The lightweight battery box from EarthX for the 680c has the mounting flanges pre-drilled. Because this box is smaller than the one vans originally intended, it wasn't wide enough to pick up an existing rivet on the starboard firewall diagonal brace, so a while back I had extended that flange. Unfortunately, once I laid out the contactors per print, I discovered that the plastic bottom of the battery was almost rubbing on the crown of the Batt contactor.

Teh easiest thing to do to fix tis seemed to be raising the battery, so I cut both flanges off the battery box and made new ones out of some angle &/or .063 scrap. relocated the battery box about 1/4" higher and now all is well.

I also wasn't happy with the battery retention solution on that box. Basically just a tab bent over on the front that caught the lip of the battery. I don't have any doubt that it would hold the battery in the box, but flexing that tab forward and lifting the battery out while standing on my head over the back of the engine seems less than fun, so I cut that tab off as well and fabricated a conventional strap arrangement. I'm rapidly running out of the .063 scrap that I had left over from cutting up the instrument panel, but I've put it to good use!

The EarthX 680c battery comes with foam inserts in the box to take up space in the bigger battery box, and I used some of them to pad the bottom flanger that the battery sits on as well as the new top strap, and now the battery is nice and snug. look good, last long time.