[shaklee3]

Trust me -- it's NOT inexpensive. Maybe your definition of inexpensive is different from mine, but adding $20-$30 onto the cost of every install is a massive expense, especially when you still have to send a trained installer out to do it. You can't rely on an end user to do it since there are all kinds of issues with placement/blockage/etc. If you choose to ignore that, you spend more money on customer support to help them install it. Notice Elon doesn't say that end users will do it. He just said no training required, just like you don't need training to install tiles in your house either.