When Tesla roof inspector came out to do a pre-installation report, he was not going to be the guy to sign off on the technique to do the installation. No matter what he said, it was obvious that he was simply going to inspect and write up a report to go into my file.
Closer to the installation someone would look at all his notes and decide the best way to proceed. There is some time between inspection and installation, so obviously internal policie could change prior to installation day.
Tesla is erroring on the side of safety, so perhaps the final decision, considering all the facts, makes them hesitant to tackle the job.
It does not matter that you hired someone else to help the job along, the final decision to send someone up on a non traditional roof is going to fall upon Tesla.
Around here they are severly backed up, because they are the best pricing around. If you want the deal, you gotta make Tesla happy.