Hi Jason , welcome to the club . We have a tabernacle base . IMO the hole location should be aft , not because of the pin but because the forward part of the mast will chop the thru tube . That happened on our W 28 and we did have the forward part cut out but not enough . If you could make a mock up of that to test , you could save yourself some grief . Another thing that comes up around here is that back in the day the pivot pin and the compression tube did not have enough clearance . It gets stuck from corrosion and is very difficult to remove when you have to . I hope that helps , good luck with your new boat and keep us posted , Mark .