http://www.civil3d.com/2007/12/expressions-and-x-y-offsets-in-labels/
http://au.autodesk.com/sessions/detail/830/
May have to have a style per manhole diameter. Haven't gotten around to creating a routine to automatically place the labels on the manhole type.
Christopher
http://civil-3d.blogspot.com/
Civil Reminders
http://blog.civil3dreminders.com/
http://www.CivilReminders.com/
Alumni