On sloped or curved survaces it seems sensible for countersinks to start with a counterbore, as in this model from another topic:https://forum.freecadweb.org/viewtopic. ... 37#p291234.
Currently the hole feature can create either countersink or counterbore, but not both. Is it a sensible feature request to have a combination?
The same situation can occur with steps, like in this model: