@xchange said:
about how to "stay on the axis" so to speak?
When I'm building something around the 'origin' axes like this, I find it can still be helpful to put in a guide line (co-linear with the axis). Just select the "Tape measure" tool, and double click when you get an inference to the axis you want to use.
Guide lines seem to allow more varied kinds of inferencing than the axis alone - e.g. to find where the axis intersects a face.
Follow me will usually work OK even on "circles" with only a handful of sides - I often use hexagonal "circles" (to model very small parts that won't be seen in detail) and find that it will usually still generate a smoothed surface.
This makes me wonder, has your "top" been created by many small "follow me" actions (one for each segment)? This can sometimes create disjointed lines due to the way that Sketchup calculates the start and end when the path is not a closed loop - the individual bits don't always "heal" together well.
You can use "Follow me" on multiple "segments" all in one go, so long as their ends all join together, by selecting them all together before "following". You might also want to search out a plugin called "weld", which lets you heal curves back into a single piece (very handy, as many operations in SU result in curves/circles being broken into sections) - that plugin is so useful, it's hard to understand why it's not a native SU function!
If you do want more detail in your circles, then after selecting the circle tool, simply type a number followed by "s" into the VCB to set the number of sides. Alternatively, you can open the "Entity Info" dialogue, select the circle, and type a new number of sides - but this way can have unintended effects if the circle is already attached to other geometry, usually better to draw them how you want to begin with. Follow me will then use as many facets as there are sides to the "circle".