Do you happen to know how deep the shelf is on the 8 footer?Hey benturner!
There are two standard widths of pockets for the 7ft Diamond and the 9ft Diamond.
One is called pro cut at 4 1/2" in entry width and the other is called league cut at
4 3/4" in entry width.
They both have the same rail geometry as far as the entry and exit.
The major difference between the 7ft and the 9ft is the slate shelf depth, which
is 1" deeper on the 9ft.
So you were probably playing on a 7ft that had league cut (4 3/4" ) pockets
Hope this helps! Take Care "C.D."