You got this! Seeing you built the Jolly Roger, this will be a picnic.well worth the $$ for CNC. He even pallet and shipped them which was not that expensive. I’m not a purist with making my own cuts etc and Knowing the skiff will start true helps with the confidence level.
unfortunately, they are now out of stock, so h80 it is.^
Chris used Carbon Core on his last build which pretty much should answer your question. To the best of my knowledge, both the PE and PVC have been used on these builds though, fwiw, their rep recommended the PVC .