Center Overflow for 75g

[eartaker]

I went up to Kel-Tech Plastecs yesterday and picked up some black acrylic for a center overflow. Im about to build my program for my CNC to cut the overflow teeth but not sure how long to make them and how far apart. Any suggestions?

 

[smoknreefr]

i did 1 1/2 in teeth every 1/4 on center