Yes, I read that bit too. Doesn't sound like a big deal but it's worth knowing about it so it can be dealt with before it becomes a problem.Ah well, I'm a bit behind the times,Did you read the bit where he was following another bike and water was coming out, seems a couple of frame tubes are not plugged and they let in water when standing, he recommends filling with ACF then plugging up, a bit of good advice,
I do all my bikes with ACF 50,