8mm Prusa PINDA Holder 4 Anet A8 E3D V6 Direct Mount

Here's a Prusa PINDA inductive sensor adapter for the pretty decent [Anet A8 E3D V6 Direct Mount by pheneeny](https://www.thingiverse.com/thing:2316850).

The drop has been increased to big enough to bring the pinda switching point below the nozzle level. As it happens the 8mm hole for the sensor is so tight that no nuts are needed, but you just screw the senor to the desired level. (This is actually very nice, as this PIBDA sensor would been a neasty 1mm-pitch 8mm screw. This seems hard to fi