And while in the same area, anyone ever seen this locking retainer used over the switch? They were usually for plastic threaded parts, think they changed over from metal to plastic switches around 77/78. But I've never seen another or reference to it, perhaps dropped as fast as it was introduced.They would basically be a single-use item, as I've nearly destroyed it twice trying to remove and getting it mangled.Proportioning valve switch locking retainer (4) by Aus78Formula, on FlickrProportioning valve switch locking retainer (3) by Aus78Formula, on Flickr