Top bar spacing.

[Sundog]

I calculated the space to be nominally the same as a Lang, but without the confinement of the top bar, centering becomes somewhat subjective.  The bees also burred out from the frame and onto the adjacent frame.

IMO, the frames are unecessary.  Part of the concept is that the slope of the sides makes the bees think it is a floor and they will not attach to a floor.

(Part of what they left behind)

[jredburn]

I am in SW Florida and my experience probably wont apply elsewhere. 
I have done  4 cutouts in the last couple of months where the actual honey comb was 2 1/4" thick.  These were very large colonies and had been in place for several years.  The brood comb was generally 1 1/2" thick  with the center comb being 16" wide by 22" long.

In my TBH's I find that the first comb in from an entrance in the end of the box is a small comb of honey and then the next three to five combs are brood comb  The honey comb then follows.
Regards
Joe