Yes this is Sassafras! No it's not Blackheart - It's something else... wild Spalted patterns on an Ivory backdrop, criss crossed with fine black ink lines. Borer holes only add to the feature!
A challenge to be sure, but the effort would be rewarded in an utterly unique final product.
Dimensions: 4 Boards @ 2950mm long x 190-240mm wide x 22-24mm