I know, it's crazy at this point, but we all knew that the ounce count section of weight loss is the most intriguing.
Here's the spindle nuts made out of 6AL4V Titanium.
The castle like lock sleeve covers that accommodate the cotter pins slip on smoothly and adjust just like the originals.

Original nut weighs in at 0.85 grams and the Ti guy weighs in at 0.30 grams.