OP

Quoted from stumblor:

We're aiming to start contacting people mid Dec, and sending out first kits a week or so after that. In terms of list size, we're at around 420.

OP

Quoted from stumblor:

Completely agree - and it's something we've spent a lot of time on in the lead up to release (I say we - it was mostly Jazzbouche. My emotional support was top notch though).
Regarding the diffusion itself and the materials for that, I've found that its not so much the material that is the biggest catalyst in achieving a good result. Anything opaque can be used, white PLA, paper even. Instead, it's the distance that the diffusion material is from the LEDs that works the best. This instructables explains it well:
https://www.instructables.com/Diffusing-LEDs-Right/
In a nutshell, the best diffuser on earth is still going to spot if it is placed directly over the top of the LED, since the light hasn't had time to disperse.
With that in mind, the most recent iteration of the UFO (the one we're sending) has a taller base section to allow the LED ring to sit further away from the acrylic disk. We're recommending that people keep the plastic protector on the disc to provide some extra diffusion (protector on top, to create the furthest distance from the ring). The end result is good. Not 100% uniform as you can see, but pretty good given the dimensions, and better than the prototype.
[quoted image]
If you did want to add additional diffusion, either directly over the LED ring or within the top of the UFO - there is space to do so. Adding something as simple as a cutout paper ring within the UFO body can work really well.