Old blower style r3 extruder for Origenal Prusa MK3

thingiverse

I assembled it myself and can confirm everything fits together perfectly. This is a combination of two different versions of the original r3 upgrade files made by Prusa. v3 # Main cover version STEP file downloaded at 8-3-2018 : https://github.com/prusa3d/Original-Prusa-i3/blob/MK3/Printed-Parts/STEP/extruder-cover.stp v2? + Blower arm from beta release of R3 downloaded stl : https://www.prusa3d.com/downloads/others/MK3_MK25_extruder_dyson_angled_fan_PRINT_IN_BLACK_v2.zip#_ga=2.101736193.1291402523.1533304366-1030976435.1523136057 I'm upgrading my Original Prusa i3 MK3 with the new r3 extruder. However, I didn't like the way the blower fan is mounted at an angle in the new design. It makes me worry that the center of mass is even further away from the Y-Axis bearings than before. I also don't like how it's not as rigidly secured using just one screw hole on a special stand, which could add extra flexing. In earlier versions of the r3 upgrade parts (I believe the beta version 2), there was still an arm to securely mount the blower vertically if desired. However, in the latest released version of the r3 upgrade, this arm was removed. I simply opened both versions in my editor and cut off the blower arm from the beta-version-2 and joined it to what I assume is called version 3. Recommended print materials are PETG or ABS, and a black color is recommended. More information about the R3 extruder can be found at: * https://shop.prusa3d.com/forum/general-discussion-announcements-and-releases-f61/new-printed-parts-version-r3-t23017.html * https://www.prusaprinters.org/prusa-research-summer-update-2018/ * https://www.prusa3d.com/prusa-i3-printable-parts