The installer I had was not outsourced. It was actually from the company in fact one of the engineers he said he writes the guides for all the installer on how to do this every now and then he does installation for bay area customers
also I did chat to him about carpool sticker here in California. He said they can just flip the switch they are just waiting for the state to come on board its the state which is stopping them..so far from getting that feature
I am glad I am having it done by one of the engineers He is installing as I am writing this