Jan's "King of the mountain" is impossible if you ask me. I mean that's nearly Supersonic at Sebenco Climb; nobody will ever achieve that, I'd put my house on it.
Oh and I reckon the Syncopia blindfolded one is also a no-goer (without a navigator). I had a go at it the other night and couldn't get past Zone 4! Gonna try it this weekend with a friend giving me instructions, should give me a fighting chance at least.