Here are a couple of pictures of a low budget lathe indexer. This goes in the back of a South Bend spindle and locks with the offset plug that is drawn in by a 3/8-16 bolt. I couldn't find my stack of acrylic sheets in the garage, so I made do with an obsolete windows CD and case glued together with acrylic cement. The paper printout from the indexing web site is attached with water based glue. The bolt and nuts were salvaged from a well-known failed project in the Bay.