Thanks for this episode.  I have used only old and refurbished computers at home since I began to use Linux. Refurbs give you the freedom to experiment with mods that you might not be willing to try on a new machine. Your speaker hack is a great example of the possibilities for making a truly custom rig. 

If you feel like doing more about PLCs or projects with inexpensive programmable microcontrollers, those would be fun to hear, as well.

Loved the show!

Charles in NJ
