So you're still peddling an obscure, rarely used provision because you've had your pants pulled down.
You do realise that an interim agreement requires the EU to agree and sign up to it? That it also requires jointly agreed detail on what the final deal would look like as well as a clear plan and timetable for completing it?
Given the no deal circumstances in which the jihadists see the article being invoked -the UK walking away from the Withdrawal Agreement, having ditched the backstop and refused to pay the money its previously agree to pay and zero clue about what it wants for the future relationship with the EU, it doesn't take a genius to realise there's a slight problem in your not so cunning plan.
Every trade expert knows its a red herring. Even Brexiters with a shred of self-respect or intelligence know it. But as you're neither, I guess its a different matter chump