I fear these were lost during the Web Site changeover. Sorry. I’ve asked our Web people to look into it.
I’ve attached the core file that tells you how to modify your H9 (this involves taking the unit apart and soldering a wire to the bottom of the main board, so modest technical skill is needed). Ignore the first page. Note that this is only needed for H9 before 16329.
I’ll re-attach the original file when we find it.