Re: Thinking About Long Langstroth
If one is to stick to "standard Lang" frame, I would instead run at least a Dadant frame deep.
This is essentially done by two standard Lang medium frames stapled/strapped together into a single unit - no need to pursue/make the Dadant frames proper.
A single Lang frame in horizontal battery is too shallow for wintering in most northern locations US, for sure in my location (granted the OP did not show his location).
Former "smoker boy". Classic, square 12 frame Dadants >> Long hive/Short frame/chemical-free experimentations.