5/16 to 1/4 adapter (8mm) for Z Brace Kit

I too purchased the Z-Axis brace kit from [Ultimate 3d Printing Store](https://ultimate3dprintingstore.com/products/z-braces-hardware-kit-for-wanhao-duplicator-i3-v2-3-series-3d-desktop-printer) only to find out that they use a 1/4" rod and nuts, instead of the 5/16" that everyone else uses.

I took [Nerys' design](https://www.thingiverse.com/thing:1574622), and cut it to 8mm deep using Fusion360, as I didn't quite like the method he uses to pause and resume prints. (I'm still too new to deal