Were I to build this again, I’d probably make it about 1/8″ smaller in all dimensions. I was able to push the sides inward when mounting on the firewall (as suggested in the plans) for a snug fit. The “lid” pushes the battery snugly against the firewall. There is a pretty big gap on the front side of the battery, but the battery doesn’t seem like it will be going anywhere–even at 6 G’s. Maybe this will help with cooling?
A couple of rivets were tricky to get to from the engine side of the firewall so I installed them from the cockpit side.
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