My local installer (a well know certified shop that has apparently done dozens of Teslas) in Montreal says he'll put one layer of Opti-Coat Pro+ UNDER 3M-Pro film, and then another one above the film as usual. This is contrary to everything I have read here these past few weeks. Is there any rationale? I suppose the film adheres better to the stock paint than to an Opti-Coated car. My installer tells me the protection is better. I don't think he's charging anything extra for doing so... He's also very honest and upfront... suggested agains full wrap (in his opinion a waste of my money although it would be more business for him). Any thoughts on that? Anybody has experienced this technique?