Update 2019-03-03: I've added a Version 2 of the cover. The Lever-screw now is used to secure the cover as well. You'll need an M3x12 screw now...
Just a quick remix of the Bondtech Prusa i3 MK3s Sensor Add-On.
This is intended to give a home to a PC4-M10 connector and connected (actually pushed through) PTFE-tube.
As such I've added an M10x0.9 thread (cause that is what my connectors use) on the sensor cover and modified the filament entry point of the housing to receive a PTFE-tube.
There is also a version for PC4-M6, here only the sensor cover is different, the rest of the parts is unchanged.
This is untested, but the threads usually work just fine.
One word of caution: the original design has the lid just snap into place (https://github.com/BondtechAB/Bondtech_Prusa_i3/blob/master/Doc/Sensor%20Add-On%20V1.0.pdf) - no idea how the additional forces of an attached tube will come into play. OTOH, the inner filament should help against it...
The Fusion 360 files are included.
Link to the Bondtech design: https://github.com/BondtechAB/Bondtech_Prusa_i3/tree/master/CAD-Files/MK3s%20Sensor%20Add-On
Link to the connectors I use: https://smile.amazon.de/gp/product/B06VVBFVMV/