Prusa MK3(S) fs-cover extruder for 1/8" BSPP bowden coupling

Edited files for 1/8" BSPP bowden coupling -- Size PC4-01:fit outter diameter 4mm ptfe tube - Thread diameter:9.7mm

fs-cover.stl downloaded from Prusa's github for MK3(S) 

both printed in PETG, 0.15mm layer height due the threads…