Endstop Sensor Filament boltless

it is designed for endstop. without bolts to install. it is better for filament channels to recommend installing PTFE, as shown in the photo. this is to make the filament easier to load. this works well in the extruder that I link to https://www.thingiverse.com/thing:4028137 .
all of these designs are without support. and printed upright

-updated 15 December 2019, section closed so that more free to pull and press. given a tolerance of 0.1 / side. new object using the arrow logo