Not sure if the black is a Doc Frye...the hex bolt should be recessed not flush. The original "Ivory" ferrule should be 1/2". Was it worked on? I would like someone to chime in to verify.
Off subject...had a guy would tap on the rail with his cue (shaft) when he missed. Fairly new GC4... I said I'm coming over to his house and tap on the furniture. He says to me...too many rules here... I said yep.