All the boards are marked.
On the right hand side when the back of the module is facing towards
you, next to the PLAN B logo the main board will be printed:
Model 15 Rev X.X
The sine improvement can be flown in, meaning you can easily add the
three parts required to do it. I would be happy to publish this
rework. Three resistors, that's it. No parts removed. It's very easy.
I will start a pole to see if you guys want me to do this.
- P