I did a search,the best I found was the double r video a few months ago-lots of work put into it! nice job!.I have a few 147,148 switches I removed in the 80's and had stashed.I am wondering if there is a way to test them with a ohm meter? They worked when removed but after 40 years of sitting in box who knows.I don't want to sell something that won't work/disappoint someone.I do not have a motor to play with,is there an easy way to Ohm it out or test with a test light? Thanks in advance Steve!!