Lets assume that we can do through hole computation between star and delta circuits. The points of the star and the points of the delta are the through holes. So, the star is on one side of the chip and the delta is on the other side of the chip. I tried to draw a picture, but I can't embed this code.
https://ibb.co/mBMHmNn
In the picture, there is an LED rope with privacy glass in the shape of a delta and an LED rope in the shape of a star. Then, there are tiny linearly parabolic mirrors in the shape of a delta and in the shape of a star. There is an error on the picture, the LED delta is label Delta Mirror
This configuration for columniation and concentration lends itself well to two sided chips.