Date: 12/31/1969 Views: 2768
Date: 12/31/1969 Views: 3327
Date: 07/02/2009 Views: 2866
Date: 08/23/2023 Views: 139558
Date: 05/23/2007 Views: 548128
Looks like more in this photo, but it's about 1/8". Note the use of black marker to gauge how much to remove and where.