+1 to wardjr
You can repair it to get back up and running. It is unfortunate that you have to do so out of the box, but unless you want to wait for them to ship a replacement carriage, this is the way to go.
If you want to send it back, it is understandable given your track record (this insane thread). I am sure they will work with you.
If you choose the modify/upgrade the carriages, I would gladly mail you some Lawsy carriages. All that would be needed on your end are LM8UU bearings and some elbow grease. There are at least a dozen constantly active users here that would be more than happy to walk you through the process.
It is shameful, and this is what happens when SD makes carriages at 30% infill 
EDIT: Another user told me they would also donate 4 LM8UU bearings to assist the carriage mod if you chose that route.
Printit Mason and Printit Horizon printers
Multiple SD2s- Bulldog XL, E3D v5/v6/Lite6, Volcano, Hobb Goblin, Titan, .9 motor, Lawsy carriages, direct Y drive, fishing line...the list goes on
Filawinder and Filastruder #1870.....worth every penny!