For starters, I forgot to change the height of the screen from 67 to 68mm, so the bezels look ever so slightly thicker. I've reduced the thickness to 20.5mm, meaning that all Tetrinsics are at the same height. They've all been given a slight angle, other than Finger3. Finger2 has been moved as far towards-wrist-ways as possible.

For the Finger5 cutout, I think I've obtained a good looking solution that has that filleted chamfer aesthetic.

I've then added the holes for the 20mm strap. I've modelled in a 20.5mm spacing, 1.5mm hole diameter and 2mm hole depth. The strap position is such that the edge closer to the camera is halfway across the front screen. This is so that sleeves can neatly slide under the other half.

Finally, the length has been reduced from 103mm to 95mm, which is about the same as Concept1. The design would probably be fine without the angled bezel now, but I'm going to keep it since it's still a Tetent at the end of the day and I may decide to unstrap and use it on a desk as a portable trackpoint+keyboard. In this mode, the thumb is used to keep the Timespy in place. 

Hmmm that sounds like a good idea actually... I've got another CB1 that isn't planned for anything... and that sweet 90Hz OLED is only £30+VAT... and I might look better wearing 2 instead of 1 because of symmetry... and I can have a Tetent input method always on me...