Okay, i'm doing a four tier wedding cake 12,10,8,6 that's due tomorrow

I bought the cake stacker system but I forgot to order the pre-cut cake boards

is there anything else I can use?

please help

AId ditch the whole system together and just stack a normal way. Run out ans get some plastic towels or bubble tea straws. There's YouTube videos to see if you aren't experienced with stacking.

Not sure how the cake stacker system would work without the pre cut boards

ACould you carefully mark and cut standard cardboard rounds? Yes, a pain, but I think doable.