Coming from a family of local contractors, some of whom install HVAC and such. Most of them probably understood this. It's part of the business. Pretty much every product, you are going to install, has some sort of training required, to install it properly, such that the manufacturer warranty isn't voided.

I'm from the same background of contractors. This stuff happens all the time and is nothing unqiue to Tesla. The regular anti: Musk, Ellison and Zuckerberg crowd out with their drums and masks again.

Yeah it would be more surprising if they didn’t have a mandatory expensive program considering how much more complex it is than normal roofing stuff.