Intro Notes: I converted my Longer LK4 Pro to direct drive and needed a way to use the stock filament run out sensor with my direct drive adapter. This allows you to mount the run out PCB and switch to this housing, connect a compression fitting and connect it to a PTFE tube.

Print Parameters: 0.4mm Nozzle, 10% Infill, 0.2mm Layer Height, 3 Vert.&Horz. Shell layers. 

Additional Hardware:

LK4 Pro Filament run out sensor and its two fasteners.