Hi there,
Typically, we recommend to try resettling a nap for just 20-30min rather until the next feed time. I know that's not what Tracy originally recommended, but usually you can tell if they're going to resettle or not within those first 20 or so minutes. If he doesn't resettle, then yes, get him up and feed him when he's due. You then do the whole process again... PUPD to get him to sleep and PUPD to resettle (up to 30min or so). Does that make sense?
You'll want to make sure you're working on an age-appropriate A time as well, or resettling naps can be futile. Would you like to post the EASY you're aiming for or a sample of a few days?