A while ago I was relaxing in a whirlpool and, while massaging my mussels and joints, I wondered what key components might be used in constructing a portable/wearable device that could simulate the same feeling as a jet stream. My list if items consisted of: - small & durable motor w/ vibration and voltage control (smooth dimmer style preferred) with a single steel rotating shaft. - battery and solar back up with plug-in adapter. - heat control unit wired into the motor. - One...