I'm not sure how the press sizes a decade prior will relate to the sheets, and produces quite a range of possibilities there.
Is there a source or evidence for Schmidt printing T212? the post here says they "used similar presses", and Obak is mentioned only once in passing without relation to Schmidt using my fancy command F. I presume the printer of T212 was the printer of T224/T229 based on the stylistic resemblances.
I can add T29 to the list of probably block-subject printed sets from miscuts. T25 is not in block format, T29, T218-3 are, most don't have cards cut so bad we can tell, or uncut material. 25 subjects on a sheet makes a lot of sense. If it was this way, I've seen no evidence of double printing to compensate for the Donovan and Corbett getting yanked from their sheet(s) very, very early on.
On a related printing note, does anyone know what happened to the second ledger that surfaced? Lelands sold it for $8k a couple years ago, it had information on T220 among other sets, but only a small sampling was shown in the listing (
https://auction.lelands.com/bids/bidplace?itemid=976570). There may be some clues in here if its owner is willing to divulge. Much of the evidence that would help piece things together appears to be silo'd; there seems much more out there and extant than is talked about openly.