Centauri Carbon Z-Axis Guide-rod Hole Cover

I was inspired by the ECC bearing cover here.  Especially after the first one of the bearing covers I tried to install fell into the adjacent hole.  So, after a couple of quick measurements, I designed this hole cover in TinkerCAD.  A pair simply sit in the hole around the rod.  Theres a small ledge that sits on the bottom cover yet lets them drop into the hole.  I added a notch for the bearing cover just in case it was too close but that wasn't necessary.

I made mine in PETG at 0.2 layer height with enough walls to avoid infill, & no supports.   
A set of 6 printed in under 10 minutes on the ECC. 

UPDATE: 28 September 2026
!! Important NOTICE !!
There is a bushing on the guide rods that extends down from the build platform by about 25mm.  The "well" for each guild rod recieves this bushing when the build plate moves toward the bottom of its travel.  These covers would prevent that from happening and may cause the printer to jam.  If you don't print "tall" items near the z-axis size limit (greater than 225mm) then there's no concern.  Thankfully, I noticed this early enough when printing a 250mm tall item and removed the covers before any issues occured!
Use with caution or remove if printing tall items!