Just curious about this. Is there a general rule on how wide your boards should be that your are glueing up for a panel to keep them from cuping? I was also told years ago but never found it to help, that you should rip one board with the grain down, then the next one with it up. Is that true and if so, why do mine sometimes fit perfect on one side and not the other side? What am I doing wrong. This gets so aggrevating. I feel like I’m not learning anything over the years, I just keep trying till it turns out right, which is taking too much time. But I must be doing something wrong. Any advise would be greatly appreciated. Thanks.