What you are asking sounds highly experimental. Generally I would not recommend trying to put a CF-19 board in a CF-18. The part you quoted looks like something Teo would write. He is a hardware expert, able to read schematics and experiment with ideas few of the rest of us would try. It seems easier to get a scrap CF-18 of the same version as yours and salvage the daughter board.
I'm a former Motorola Comm Tech so tracing down signals on schematics doesn't instill any fear into me lol. I was looking for more of a turn-key method to do this without having to hunt down schematics for both units and start pin-to-pin comparisons effectively "re-inventing the wheel" when someone may have already done it. What I got out of the FAQ was yes it works, but maybe not. Just didn't instill enough confidence to spend the money on a "maybe".