You're on the right track, Paul. I've found that lower RH, between 60-65, is the right range...and more humi time after delivery, at least a few weeks, at that RH is best. Most cigars arrive too wet...prolly being stored at 70% (or more). I have had some newly bought cigars increase the RH in a tupperdor from 65 to 73 RH.
One way to reduce the moisture in a newly purchased cigar, if you can't wait the few weeks, is to "dry box" it. The ambient RH has to be lower than the RH in the humidor, though. Letting the cigar sit in a humidor or cigar box that has a lower RH will help.