Like many here, I started with the 70% rule. While most of my NCs seem to smoke fine at a higher RH, and I leave that particular humidor around 68-70%, the CCs are a different story.
The CCs reside in my cabinet, and I keep it more in the 59-60% range. I've kept it that way for the last year of so, and find that for the most part the cigars smoke better and the flavors are a little more pronounced.
Then there are a few, rolled a little tightly, that benefit from dry boxing for a while as well. Although I don't really put those in a box - they just sit out in the open for a few days. Nevada
is one big dry box.
Looks like I may have to look into some 55% beads and do some experimenting with a desk top humi. Food for thought.