let us clarify the double ended support for cranks once and for all .
This is a simple method of dealing with one piece connecting rods.
If I had a small machine shop and I wanted to make a conversion of a industrial engine ,It is the way I would do it.
Otherwise - I have to make that big crankshaft, front case two forward bearings, etc.
The adaption of the industrial engine -much more simple. shafts and bobs -pressed together
The manufacture of a proper cantilever crank requires some pretty good machining, hardening , a lot of case work-
Same reason the rotary valve is not for the faint of heart - .
It takes a hell of a lot more work and capital to do THAT job- but then who want's a rotary valve anyway ------?
Guess ----