Social Distancing Laser Hat

Mark your personal space with the Social Distancing Laser Hat! This will draw a circle of approximately 2m radius around you, letting you know if you're too close to someone or if they're too close to you!

Video here: https://www.youtube.com/watch?v=lmvdseag7vk

I'm using a 1mW Class 1 laser, which is non-harmful to eyesight (but don't stare at it ffs). Bystanders would not be in any danger.

Full Fusion 360 model available here!
https://a360.co/2VNXtfa

Bill of materials: (actual parts / examples detailed below)

3D Printed parts as per Fusion 360 model. I printed on a Prusa MK2.5S MMU2S, using PrusaSlicer and the default 0.35mm FAST profile, which worked flawlessly first time.
2off skateboard bearings 22mm x 8mm x 7mm
1off 6V DC geared motor
1off 4xAA batter holder with switch
4off M3 x 5mm screw (button / pan / socket head, etc., not countersunk)
1off M3 x 8mm screw
4off M3 screws for mounting to hat, length selected according to particular hat (mine are 18mm).
5o