Bought this black walnut cookie off of Facebook marketplace for a good price. The only catch is it is warped, cracked, cupped, and twisted. It's about 4 in thick and that's plenty of material to make a coffee table, but I need some advice and guidance on making a router planing jig please.
Yeah, I think the biggest thing is that a cutting board will already be "kind of" flat when you start, where this giant cookie looks like it will need a good 1/8" or even 3/16" removed everywhere to level it out if you want to clear most of those grooves and checks. Best solution is probably a router sled followed by a hand plane.