There's either 8 or 12 bolts around the top of the module, but opening
it won't yield much. About 1 in 20 air/rafts (mostly older ones) will
have at least 2 of the bolts be a different head size than the others.
I don't think they came from the factory this way. About 1 in 50
air/rafts have one bolt that's stripped. I know they didn't come from
the factory that way.