Hold on a minute. For single deck, I am starting the IRC at -4 so I always thought the pivot point was zero and the key count was +2 which is where the ramp was initiated.
For standard KO, 1D IRC is 0, key is +2. Pivot is always +4
If you're starting at IRC -4, then your pivot is 0 (which is good if you want to transition to true counted TKO), but your key should be -2 -- everything -4 from what's in the book.