First, I did search for info on this and found most of the answers I was looking for. I just received several sections from the trunk of an 18" diameter walnut tree and need to do some studying before I process them, but I'm wondering how urgent it is to get the piths out. I just finished ripping a bunch of choke cherry trunk sections, cuz I know fruit woods are prone to cracking and you need to get the piths out quick, What about walnut? Can I let them sit for a few days or should I get out there and rip them now? Just seal the ends and not worry about it for now? Other than rolling them around, there's no way to move some of them, so those will have to be halved just to be able get them where I want 'em.