Hey Allen first I'd like to say welcome, it looks like you have a great work space and the racks are working out nicely. I had a similar system a while back and it seems like "overnight" I added a few hundred more bottles so I started going up the wall with 1X2's building shelves as it grew and before you know it I have dozens of shelves in several sections plus a full wall of peg board I find useful. This stuff clearly has a life of its own but I do like how nicely they fit and labels are clearly visible.
All the best and please keep posting.
Terry