It's not overly original design, I have seen a lot of similar in parts, none of them was exactly what I wanted. Technically, I had to design everything from scratch, as none of the designs were done in the CAD I could possibly use (which is nearly none, because I seem to be unable to handle mouse-driven software). So I integrated all the ideas I've seen to end up with the effector that has a probe, uses hotend nozzle for this purpose, actually fits e3dv6 hotend and has a cooling duct that I like. Most parts are printed in PLA, fanduct in PETG (in reality I also printed some fan holder links in PETG, because at some point I had to print them without cooling and PLA doesn't take that lightly). To build the thing you will need a 50x15 blower fan, a microswitch, a bunch of M3 screws and nuts of I don't remember what lengths and a couple of smaller screws (2mm?) for microswitch. This is bed leveling in action: https://youtu.be/Ywp_qdY8-IA