“Here’s the bill of materials I ended up with:
Teensy 2.0
Adafruit 16x9 Charlieplexed PWM LED Matrix Driver
LED Charlieplexed Matrix - 9x16 LEDs - Warm White
Rotary Encoder
Solid Machined Metal Knob
PowerBoost 500 Charger
Lithium Ion Polymer Battery - 3.7v 2500mAh
Mini Magnet Feet for RGB LED Matrices
Piezo Buzzer
I supplemented some additional fasteners to screw into the mini magnet feet from the front clamping the case layers together.”