[sdiy] square pads

[Olivier Gillet]

> For those upside-down things it's quite useful to have a silk screen
> that shows which way the notch should be. Also, it's very very useful
> to have a drawing that shows which way the components should be
> oriented. It makes it easy to check your build that one last time
> before you power it up. You can't get that smoke back in.

I ship a 1:1 color photo of an assembled board with my kits. It's a
just a few cents when printed in large quantities but it's very
helpful for cross-checking parts orientation or resistor colors -
especially for those who assemble their kits far from computers and
can't simultaneously check the assembly instructions online. Wouldn't
work for an extra-large vocoder boards, though :)

Olivier