Fuel cell rules for the Iron Butt Rally are quite strict to avoid situations just like that.
Baffles or foam are required, as are solid mounts, quality plumbing/venting, and electrical grounds.
I'm quite impressed with what some of these endurance riders are doing, but us LD riders have already worked out most of the bugs that they seem to keep finding...
Ken IBA# 366
'13 Dark Graphite Metallic K16GTLD
Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from . . .