Fixture for alignment of the screws Z-axis Anet A8

I didn't know how to correctly align the portal. To find a model if it is, I couldn't either. So I made two models. The model on the shaft I didn't test because I have a busy shaft.
Do autohome, then raise the portal to 80mm or more, set of this parts, drop the portal on the 15mm to clicks, raise, remove.
I hope everything is clear.
This model is for PLA. Use 1.03 or more for ABS. Use sandpaper on glass to both parts were the same size to 0.05mm.