They are NOT Ford specs, they are much tighter than Ford specs. I am the one that posted them originally. Those specs were hashed out over 4 years with the help of one of our rental accounts that can put as many as 20k on a unit the first year. So we learned very quickly what worked and what didn't work.
Not sure why you would worry...many others on here have aligned to those same exact specs.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).