I am tring to work out how many layers of laser cut acrylic I will need, in total. I am using 2mm acrylic.

I have used a nice python script to generate a dxf file than can be laoded on the laser cutter. It used the most excellent dxfwrite.

At the moment I have six layers:-

It would be nice to reduce this down by one or two. Limiting factors:-

Giving at least 5.2mm, which means I can not (thanks to the switch) fit everything in just 5 layers. Top, bottom and 6mm inners. Time to sketch the PCB in https://www.tinkercad.com/

Mock Up of PCB