I came here to ask precisely the same question and found that diver had beaten me to it. Thanks, brendan, I should have cottoned on to that!
Actually not too fierce for Paul McKenna. Managed to finish without aids, all my guesses being correct, apart from the above.
For info, diver, Paul is the most difficult of the Mephisto team. Don Manley the most accessible, with Tim Moorey somewhere in between.