is CAM350 a PCB design software? (Like Eagle?)
CAM350 is a gerber viewer software. it can be used to check whether the PCB designed ok or not.
suggestion for Elecrow-
offer more board sizes..
**Bonus to multiple size/dimension offerings, NOT just square sized, but rectangle sized too for fair pricing and not over charging for not being 'square'
adding these other sizes/dimensions options will help get more customers... (I would have used ya over SEEED if the sizes were available this time)
Elecrow also provide the following selections.
5cm x 5cm
5cm x 10cm
5cm x 15cm
5cm x 20cm
10cm x 10cm
10cm x 15cm
10cm x 20cm
20cm x 20cm
And there is also 5pcs or 10 pcs for your choice.
You can also add V-groove to separate same sub-boards in one PCB panel.
Of course the color is free for sample PCB.
I like their 4 layer PCB service specially. it need only $23.9 for 5X5 cm max board.
it's a great team to provide such great service.