It looks excellent, congratulations!
The side where the neutralizer brushes make contact.On the CD itself it is best to pick the flattest side. CDs have on one side a small circular "ridge". Glue the strips on the other side.
No, just one side.
Prepare a color image for laser engraving
how to prepare leather for sewing
DIY EEG (and ECG) Circuit
Mini UFO Interceptor Popsicle Stick Model