Good morning TB. I recently purchased a used Diamond BCP-1. It came with the reverse polarity cable, but not the original 18 volt power supply. I've been powering it with my OneSpot > Reverse Polarity Cable > to Pedal. Am I losing out in terms of headroom or functionality by only running it at 9v? Is anyone able to recommend an 18 volt power supply that works for the Diamond? I believe the Diamond 18 volt power supply has to have a positive tip (not negative) which appears to be non-standard. Any help is much appreciated.