Video of CNC machining a double sided part.

[Shinobiwan]

you mentioned modelling board? what is this? As im also still learning im keen to try as many different materials as I can.

Thanks!

This is the stuff:

Polyurethane (PU) 580 Model Board Tooling Block in High Density - Easy Composites

Machines brilliantly although tough on cutters and isn't cheap for what it is. If you need a material that'll give you a super fine finish when sanded, this gives you that.