Of all the preposterous assumptions of humanity over humanity, nothing exceeds most of the criticisms made on the habits of the poor by the well-housed, well-warmed, and well-fed. --Herman Melville
Can you give me the name of yours.
Unfortunately he retired. (But he was wearing this long-sleeved white coat when he left the office -- I wonder what that was all about?)
The problem is that you either need a flat surface or you must lay the new planks exactly over the old ones. For plastic/aluminum siding they use the fanfold foam "insulation" to produce a flat surface, but that likely wouldn't work so well with fiber-cement. To lay new planks over the old they both must be about the same exposure and thickness (and generally FC is a bit on the thin side).