Began fabricating the battery hold-down bar, and began cutting the eight lightening holes in the Odyssey battery box. I used a fly-cutter mounted in a hand-held electric drill. Sounds scary, but it works pretty well if you go slow and clamp everything down good and tight.
That grimace reflects the ill-advised technique of using a fly-cutter mounted in a hand-held drill.
Drilling lightening holes in the battery hold-down.