Ah, but those aren't your max cluster are they ?
In the multi country rides. My max currently is 4 in one ride (lu, be, de, NL). I recently tried to do 5 in one, but scratched at 165km cos I was fed up and didn't fancy another 90km it headwinds in the rain. I plan on a second attempt tho.
But it take a bit of work to get my cluster firstly down the Limburg, then across the Ardennes to Luxembourg. So I think for now 3 is good going. I'm guessing Ivo has 4. And I can't remember where Zed's cluster stops...
J