Replicator 1 carriage remix

After breaking primary Y-carriage print twice, I decided make my own version. So far there's only primary y-carriage for lm8uu, I might add more later.

You need rest of files from original.

Changes:
-bearing snapper is now same style as in secondary carriage, which in my experience works really well!
-added cable management hole, similar to factory made
-Second place for end stop. Some extruder mounts require it.
-and more clearance for bottom solders of endstop, in case your material is slightly conductive.
-tiny bit strengthening in some places
-bigger backend holes for rod guide, in CTC Bizer it requires some shimming, bigger hole makes shim removal easier
-fixed bad surfaces.