The basics of FlowAlongSrf
In several cases, is easier to model something in flat form and then rearrange it to the final shape instead of dealing with multiple construction planes. Here is where FlowAlongSrf becomes useful.
In this example, one can simply model the details over the XY axis and then apply them to a curved surface with the ability to make some adjustments. Using the Record History feature in each component of the command like Objects to flow; Base Surface; Target surface.
Playing with ChamferEdge
Despite that Rhino is a surface modeling tool, sometimes is quicker to play around with simple tools like ChamferEdge on common solids. Taking advantage of some internal configurations like Distance From Edge instead of Rolling Ball.