fine-tip Sharpie pen to write on a silk screen rectangle, we've decided to
try a laser engraver instead.
+Digging around on the web, we found an article on
+[laser marking circuit boards](https://jtechphotonics.com/?p=1164)
+that made it clear this was something we should be able to do with a 1W
+laser module. Since Bdale had a spare [Lulzbot](http://lulzbot.com) TAZ 5
+printer sitting around unused, and the J Tech folks had a pointer to a 3d
+printable mounting bracket that can replace a TAZ head, we decided to give
+one of their [1W 405nm](https://jtechphotonics.com/?product=900mw-405nm-laser-and-2-5amp-safety-compliant-driver-kit)
+ packages a try. A big motivator for going with this
+laser module instead of one of the higher power units (which might have had
+other uses) was that this module can focus down to 0.003 inch spot size!
+Since some of our circuit boards are quite small and we're way up in the
+4 digits now, being able to engrave thin lines seemed like a good plan.
+
More details to come...