Rule of thumb, is , dont use your thumb, use a bullet daimeter. If your in a boat still use the thumb and make sure your tail is covered to prevent detonation if your less than 60 % full.
Oh hang on I might have that back wards
Rule of thumb, is , dont use your thumb, use a bullet daimeter. If your in a boat still use the thumb and make sure your tail is covered to prevent detonation if your less than 60 % full.
Oh hang on I might have that back wards
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