Ghostbusters PKE Meter Mk 1 made from Iona shoe polisher

This is a Mk 1 version of a PKE Meter I've been working on for many years. The shell is a resin casting I made of an Iona shoe polisher I modified to match the prop. The wings (3D printed) are driven by two servos. The electronics are controlled by a Teensy 3.2 Arduino. Touchswitches activate the functions and also change modes. In the default mode the lights chase slowly when the wings are half up and chase quickly when they're full up. Touching one of the touchswitches on the flat face will change this mode so the speed is controlled by the knob in the handle. This matches how the real prop worked. It's powered by five NiMH 2/3 A cells with a charge port at the bottom of the handle. The code, written mostly by Patrick Benton, might need some tweaking as I'm having issues dialing in the exact servo positions. Bryan Ambacher provided the original Iona shell, along with some great reference photos he took in the early 90s. As Teensy 3.2s will be impossible to get for at least six months I'm looking for an alternative Arduino as I might offer kits. I also want to switch to smaller lithium batteries that will allow me to install a larger speaker in the main shell.