Change well size of low heater board

[tatthangvd]

We have to change the size of all the wells to 4.9 mm as required by all the PCB manufactories. The spacing between the LED board and the low heater board is then reduced to 3 mm.
In the original board, the distance from the edge of the well to the traces is less than 200 um in around 100 points.
That leads to cutting of the heating traces.