Giraud annealing machine observations

Do you know what the spacer's should be set at for the .308...mine seems to be dropping some when I changed from .338 lapua to the blue wheel...i imagine i have the spacers setup incorrectly ...but don't seems to find the sweet spots where they drop perfectly. thanks in advance.

1 spacer towards the machine, 3 spacers between the blue wheels, 4 spacers on the outside