Very often you see the recommendation to alternate the grow ring orientation when doing a panel glue up. Otherwise they fear that your panel will bow enourmously. An example I just plucked from the Internet:
In real life panels don't always behave like they should do either, I have an old table top standing in a corner of the garage. On close inspection it proved to be bowed all the way over the entire width.
But the grain in the individual boards was perfectly alternated, up, down, up, down:
Which shows how usefull theory can be. :-)
In the mean time I am inching forward on the workshop rebuild. The bench is moved into its new position, and I have attached the old table top to the wall above the bench to be used as a tool rack. It starts to feel like home allready!