1. You have a surface and also a center-line on which to place the stones and an object that will be subtracted from the surface
2. The user should be able to specify the distance between them how many to place etc. They should always be placed perpendicular to the surface like before.
3. Then I subtract the objects from the surface to create the notches and place the stones.
I am highly experienced with 3DS Max and since I have completed a similar script for you in the past, I believe I can complete this script fairly quickly to your specifications. Ready to get started today!