After I convinced myself that MIDI over Bluetooth is viable, the breadboard approach didn’t seem adequate anymore, and so I fired up ye olde soldering iron and made a more durable version of the MIDI-Bluetooth interface. It even has a power switch and a little power indicator LED. Now I need to find a suitable enclosure. That’s always the hard part. RadioShack sells an enclosure whose size is almost right, except that the dimensions of the circuit board (also from RadioShack) are the outer dimensions of the enclosure. What were they thinking?