Day 8: 71%! We're in business! I transferred some cigars over in the morning, and checked them after dinner. I had placed 69% Boveda packs inside, and it was right at 69%, so I put the rest in.
Looks like it's going to hold 55-ish cigars, which isn't too bad considering it's rated as a 65 count. I've heard of some that you can barely fit in half of the listed count unless you are a cigar Tetris master.