This toolkit will have more and more useful scripts that can speed up repetitive tasks.
You select some continuous faces.
Then you click on select every nth faces and type the number you want.
This tool combine and separate and clean history.
Translate on the y-axis your object pivot to the lowest point.
Restore the xform translate to worldspace.
Center selected objects to the world center.
Move selected objects to the center on the grid.
Move selected objects on the grid only on the y-axis.
Merge multiple curves into one.
