-and so forth. A reference design for a companion board will be documented
-soon, and will be compatible with open source Arduino programming tools.
-
-We are also working on the design of a hand-held ground terminal that will
-allow monitoring the rocket's status, collecting data during flight, and
-logging data after flight without the need for a notebook computer on the
-flight line. Particularly since it is so difficult to read most notebook
-screens in direct sunlight, we think this will be a great thing to have.
-
-We're also contemplating other altimeter designs with either more or less
-features than TeleMetrum aimed at different needs within and beyond the rocket
-community.
+and so forth. We've built and flown some prototypes including
+[TeleScience](/TeleScience), but no companion board designs have made it to
+production yet.
+
+We intended to publish a reference design
+for a companion board, but one of our customers beat us to it! You can find
+his work on how to use an Arduino as a companion board on
+[GitHub](https://github.com/robderstadt/AltOSCompanion).