First attempt at making these couplers after deciding to change the stock ones (mainly just trying to eliminate potential errors).
Seem to have removed my Z axis wobble, but it's difficult to be 100% sure.
I printed at 95% infill instead of 100%. Luckily I printed 4 at a time because the first one snapped after trying to tighten it too much and too quickly.
I will probably try and print again at 100%, but for now they seem to be working well.
Not the easiest to install on my Anet A8 (AM8 variant), but I seemed to have got the second one on easier.
PrimaValue PLA (Dark Grey) - 190C