I spotted a fascinating little gadget in a post to the Vintage Apple Macintosh Enthusiasts Facebook group in April this year. I sent a PM to one of the co-creators, Joakim Larsson , and that led us down the rabbit hole of conversations which resulted in me buying one and then doing the full video REVIEW shown below. Great for diagnosing power issues on various vintage Macs, even if your not savvy in electronics. No need to even open the Mac's housing, in many cases, which is fantastic.