Just started perusing this book "Mordin on Time" (pdf) and was wondering if anyone has studied this... is it still relevant and worth a read, as it looks to be quite old.
I'm sure I first saw in on Peter's bookshelf in one of the YouTube videos.
If it is still worth a read, can someone explain to me what he is on about re 'classes A-H'?
I know we have Grades 1-3 with classes 1-7 for flat/NH racing, but I cannot find any reference to classes ever being A-H ever in history, and I've been googling for days and had deep complex conversations with ChatGPT who says they've never been classed A-H, and that they are Mordins own unique set of ratings. If so, how do you categorise your new adjusted times into A-H classes?

TIA