Ender 3 Z-axis preciese switchless adjustable endstop

This is v1 endstop!!!! See v2 at https://www.thingiverse.com/thing:6562825

Stock Ender 3 endstop uses microswitch and in my cases has poor repeatability and long time stability wich leads to low first layer quality.
In switchless endstop used roller pen tip and M5 stainless steel bolt as a contact pair and M3 bolt for position adjustment. After assembling you need to put M5 bolt and roller tip in to initial contact (endstop is normally closed). Then mount on a printer frame and fine tune home position using M3 bolt.
In my setup i have this repeatability results:
G1 Z5
M48 V4 X20 Y20 P15
ok
M48 Z-Probe Repeatability Test
Positioning the probe...
echo:busy: processing
echo:busy: processing
Bed X: 20.00 Y: 20.00 Z: -0.00
echo:busy: processing
1 of 15: z: -0.002 Mean: -0.002500 Sigma: 0.000000 Min: -0.002 Max: -0.002 Range: 0.000
echo:busy: processing
2 of 15: z: -0.002 Mean: -0.002500 Sigma: 0.000000 Min: -0.002 Max: -0.002 Range: 0.000
echo:busy: processing
3 of 15: z: