After Hitachi stopped making their wands I ended up having to repair a bunch of units for clients. I decided to design my own high powered unit that was more robust than the original.
This unit uses an EMAX CF2822 Brushless DC motor, Speed Controller and an Arduino.
If you like and purchase the design feel free to ask me for a list of parts, wiring diagram and the code.
I have included both the 3D printed mold to cast the silicone shaft with as well as a file you could print using TPS.
I have tried ABS and PLA, both seem to work well at 0.2 layers.