https://leatherworker.net/forum/topic/20409-exstension-table-for-29k/
https://www.homemadetools.net/forum/singer-29k1-conversion-table-70288
https://www.flickr.com/photos/chris_in_ottawa/with/31804352017/
https://www.flickr.com/photos/chris_in_ottawa/31804351977/in/dateposted/