??
He says
until I paired the remote to the box for RF, the front lip of rack shelf was blocking the IR receiver!
The story this tells is
It looked like
the front lip of the rack shelf was blocking the IR receiver, so the IR receiver didn't work
It looked that way because
when he then paired the remote to the box for RF
then the IR worked... so it seemed that the problem had been that the front lip of the rack shelf was blocking the IR receiver!
That's what I see there. No mirrors involved, either.
