Lynn, on my behalf, if you go to sun n fun and come across Ray Ficet from Marcotte redrives, could you ask him from an engineering standpoint about the tapered pins in my Marcotte redrive coupling.  I haven't received the dial indicator from Harbor Freight as of yet, so haven't checked to see if it is end loaded with the tapered pins, but it runs in my mind that it will be under load.  Thankyou  JohnD