My TNC-X was originally built as USB only but I've been having problems with the USB drivers so I decided to modify it to support both Serial and USB. I added the serial port and power plug inside the battery compartment so when being used through USB it still has no exposed unused connectors. I also added a DPDT switch to reconfigure the jumpers for both modes. The other photos are just me playing around with a jewlers loupe in front of my digital camera to get macro shots.