Tourist Permits (FMM) and Vehicle Permits (TIP)

Great info and thanks for it.

Have a couple questions.
We cross at the truck crossing at Nogales,the options on the website are Nogales 1,2,or3 ??

How long does it take mailed replies to Canada to arrive?

FMM's can be purchased 14 days before so if I want to cross on the 20th I could actually apply for the 6th or later?

For the "date of arrival to Mexico" do you have to be bang on the date you apply for?

Thanks Irl