[TriEmbed] removing the "bumps" from OSH Park boards

[Pete Soper]

I found the perfect tool: a large diameter grindstone in a fixed 
position Dremel (i.e. mounted in a press or something). It's perfect for 
very quickly knocking the bumps off and you can make the edges as close 
to flat as your eyesight and hands allow. Getting rid of the whole bump 
is important for minimizing the hassle of pasting with a stencil (any 
little bump can cause the alignment to be messed up). But it also makes 
the boards much more attractive.

But folks, be sure to wear a good mask. I can only think of one thing 
worse than fiberglass dust getting into the lungs. The good shop masks 
with the "easy exhale" valves seem to work very well for me.

-Pete