ie. I need two circles, one with 26 nodes evenly spaced and the other with 30 - a walk in the park if I were using a CAD package
CADTools is pretty cool like mentioned, but an alternative for that request is to just use construction geometry, here is a file that you will be able to understand.
https://dl.dropboxusercontent.com/u/25890514/nodes%20%281%29.cdr