@Michael_Bush says that bees, given the choice, like to have 1 1/4" frames spacing (center to center) for rearing brood and 1 1/2" frame spacing for storing honey.
At 1 1/4" spacing you end up with enough room for 9 frames. But, the frames are snug, (EDIT: Actually it is impossible to achieve 1 1/4" spacing with frames that are 1 3/8" wide) which I imagine would make them difficult to remove once they are shellacked with propolis.
Anyway, @Michael_Bush also recommends taking the standard frame (which has a width of 1 3/8") and using a table saw or bandsaw to trim them down to a 1 1/4" width. Once all of the frames have been slimmed down, I think 9 frames will fit nicely in my 8 frame brood box and maybe I will have less errant comb and happier bees.
I’d love to hear everyone’s opinion on this.
And… @Michael_Bush, forgive me and correct me if I incorrectly stated your opinions.