I am glad he explained twice why the handle on the bin was like it was, because I might not have understood it otherwise. Or as Mr Dyson himself may have said,
"I am glad he explained twice why the handle on the bin was like it was, because I might not have understood it otherwise. Having it explained twice meant that I may have understood it more, where as once meant I may not have understood it at all and that's why it's been explained twice".
Talk about less being more.