I also visited a couple of home gardeners who followed.
Summer pruning uses thinning cuts which does not encourage new growth (as opposed to winter pruning which stimulates growth).
During the summer months, remove leafy upper branches that are over-shading fruit on the lower branches. The summer thinning cuts help build your ideal tree.
Remove crossing/rubbing limbs, and limbs that grow inward toward the tree's center. Create a sturdy structure. As mentioned earlier, long, weak growth should be pinched back. Hand pinch, or prune, 3 inches (or so) off the end of each soft, leafy shoot. Repeat in late summer if side shoots grow rapidly out.