I genuinely don't think he gets the point...he seems to be of the school that once a fixed rate starts to beat a tracker rate, you're in the money.
This is obviously nonsense, as it's the average rates for the period that you need to look at.
I'm on an ECB + 0.5% tracker, and in my view any alteration of this would be lunacy. If I had the outstanding mortgage amount in cash tomorrow, I'd stick it on deposit. And if someone blandly advised me to fix even a portion of the mortgage, I think I'd laugh at them.