Credit goes to @jneilliii . My design is based on his thing:2502410 .
Position of screw hole is not the same on Tevo Tornado as on the original's Creality CR-10 design.
I also made it thinner. The plate on the side is only for support during the print process. You can remove it. For me it didn't even print.
You will need to change the screw from the original M3x6 to M3x8.
If you set the physical distance to 1.5 mm as described in this article:
The sensor will click at 3 mm. I piled up standard printer paper of 1.5 mm lowered the nozzle to contact the bed, and stacked the paper under the sensor, than tightened the screw.
Feel free to use/share/modify/whatever-you-want.