Prusa MK3S Tighter Extruder Body (R4x1) - TESTED

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The Prusa MK3S R4 extruder body features a bottom heatbreak opening that is 0.40 mm wider than its predecessor, the MK3. The new dimensions are Ø22.8 versus Ø22.4 of the MK3. Version 4x retains this design decision. Tighter tolerances in the neck ensure a secure grip on the heatbreak. The neck socket dimensions have been set to +0.1 mm, measuring 16.1 mm and 12.1 mm respectively. Original files for the Prusa i3 can be found at https://github.com/prusa3d/Original-Prusa-i3/tree/MK3S and https://www.prusa3d.com/prusa-i3-printable-parts/. The issue with the current extruder body has been discussed on the forum at https://shop.prusa3d.com/forum/general-discussion-announcements-and-releases-f69/the-current-mk3s-extruder-body-is-0-4-mm-loose-r--t27757.html and on GitHub at https://github.com/prusa3d/Original-Prusa-i3/issues/119. Information about the E3D V6 1.75mm Heat Sink blueprint can be accessed at https://e3d-online.dozuki.com/Document/Ztd4NlQ3MF2x61nj/V6-175-SINK.pdf. Updates to the Prusa i3 design include: * October 31, 2019 - Extruder Body and Extruder Cover redesigned with thicker fins, following official updates. The bottom opening remains at 0.40mm clearance. * March 6, 2019 - Neck tolerances changed from +0.2 mm to +0.1 mm for an even tighter grip on the heatbreak. * February 15, 2019 - High-resolution model released.