i3 Shipping Brace

This is a similar concept that is used with large format inkjet printers which immobilizes the print head to ensure it doesn't bounce around and damage the print heads when being transported.

Print it out with any material, leave it on the bed. park the lower x rod into the cutout and zip tie it down. E carriage should be between the posts. sufficient bed adhesion should keep the Y carriage from moving, or you can use a screw into the Y carriage through the centered hole.

V1 has tiny zip tie slots. V3 makes them 2x4mm plus a bit to make sure you can get whatever you have through.

V3 also adds a centered hole in the base so you can screw it through the bed and into the Y car so it becomes reusable. I also added a bit more height to the base of it so that it hopefully has less of a chance to flex and come off the bed when depending on adhesion to hold the Y car.