jupyter notebooks dont work with latest code, coils not in series, spacing between via and track too close

**Jupyter notebooks don't work with latest code**
Your code stopped working after commit 7bde6ea .
The changes after commit 7bde6ea , for the led board, make several notebooks fail, as a result it does not work.

**coils not in series**
In a normal electromagnet all coils are in series. In your boards, the even layers are equal to front copper and
the back layer is equal to the odd layers.
As such your motor, has part of the coils in parallel. This increases current.
Magnetic strength is linear with current. Heat dissipation goes via the square.
As such, your board might not be optimal if heat is the limiting factor.

**spacing between VIA and track**
Boards are made with track width of 0.127 as prices go up on PCBway below 5 mil.

I also found these holes quite close, i guess current flows here from red to blue and should not continue on red


Still the via is very close to the red, which makes it tricky.


I am very happy with the package. I just point this out to help others.

Start by comparing the notebooks with commit 7bde6ea and identify failures introduced by the LED board changes. Then inspect the generated coil layers and the illustrated via/track spacing against the reported 0.127 track width. Done means the notebooks work with the latest code and the coil and spacing concerns have a documented resolution.

Written by the indexing model from the issue text.