Circle Packing + Flow along a surface

Hi people. 

I am sorry if i am asking the question again which has been answered before in this forum. but for some weird reason, i am not able to figure out how to do it. and i am new to grasshopper. please do let me know if there is a easier way and making the 2D Geometry flow on 3D geometry without distortion.

I have attached the Rhino file & Grasshopper file which i am using for generating attractor pits. 

once the 2D Grid of circles are generated, i would like to wrap it or make it flow along the surface. but the circles are distorting and becoming ellipses. i need the circles to be perpendicular to its center point vector. 

i found a video which did this with ease. but i am not able to figure it out. any help in this regard will be appreciated much. https://youtu.be/MQ87Rn5WLo8 (http://sac3.blogspot.in/2008/08/grasshopper-sections.html) 

Surface used : Curved_Surface (Attached below)

GH used : Flat_Attractor_Grid.gh (attached below)
Distortion Problem : 123.6.jpg (attached below)