@FelixH there is precision piezo orion that do the same thing as smart effector...i use it on my hypercube printer...and i also have 3 kossels with smart effectors on it...and the result is the same...very good stuff...(for my delta printers the smart effector along with magnetic arms and duet2 wifi was the best decision i made, on my hypercube the duet2 wifi and precision piezo orion v2 was the best decision i made)on my cartesian printer(prusa clone) i use bltouch...because is what was the best at that time, though if i had to make it again i 100% go with precision piezo...