Hi guys,
@Chris33, we know the weight because the weight of the SLS nylon is close to the actual weight of injection molded nylon. The CAD program gives an accurate calculated weight of 27.3 grams, we measured ours and it is 26.7 grams. So we kept a little margin and said 28 grams.

Our first prototype was around 66 grams, so we lost a lot of weight.

The other question we hear a lot is if the cable introduces flex in the system, so that retraction is difficult.
The answer is no, that is not a problem. Any flex in the cable is reduced by the 30:1 gear ratio inside the unit.

Lykle