Wow. After sorting through the literature i got with the Serviglide I found a letter from the original owners son. His name is Bob Filip. So once again I turned to the internet. I was finding a trail of dead ends. After that I turned to Facebook. There were a few on there but none around Dearborn, Mi. I started at the top of the list and sent a pm asking if his dads' name was Joe and had he ever worked with Rodney Martin. A reply came back in minutes. "yes to both". He lives in Tennessee now but his wife has family here in Midland and they visit about once a year. And from there I have heard some great stories. I love Simplexes!
I copied some of the conversation for you.