Learned something new today. 61 core supports had holes. 62 and later are just dimpled, as seen in Norm's photo, except 62-65 has 2 dimples. Went out to the herd and confirmed it. Haven't ever parted out a 61, so hadn't made this observation until now.
Cool what Steve taught us all by posting that pic...

dimples are better keeps the water out. the 61 uses a non hardening sealer under the buckets.

by dimpling it would be stronger too.

Nice Steve!