Yes the fiber plates have grooves in every one of them on the tusk kits.
I put mine in offset from each other, maybe to try for better oil movement. I don't really know was just a thought.
I installed them so the grooves were all not aligned. Like 1 plate with 2 grooves in one slot, then the next plate i moved the groove to the slot next to that one, and so on.
Don't really know what is right or wrong, just what I did.