I recently purchased an A5 and was excited until I realized both of the Z-axis linear rod stabilizers were either broken entirely or did not hold tension due to fracturing at the screws. I designed this as a replacement for both of the sides. You do not need to mirror or anything. Simply print and flip one to match the correct orientation.
They use an M3x8mm button screw originally, but I installed them using M3x8mm socket cap screw (doesn't matter which you use).
I printed them using eSun PLA plus at 235C, 50% infill, 4 top layers and 4 bottom layers, 0.8mm wall thickness, 0.2mm layer height.
-You need to unplug the motor and take out the 2 screws holding it in place at the bottom of the Z-axis.
-Manually slide the linear rod down and slide the holder in place (two holes go towards the two holes on the frame).
-Slide the threaded rod and linear rod back up and mount the motor.
-Move the stabilizer in place and attach with two M3x8mm screws.
-Plug the motor back in.
4 top layers and 4 bottom layers, 0.8mm wall thickness, 0.2mm layer height