Summary

Bracket V1 is a replacement for the original that comes with the machine, I found the slots in the original did not allow the rollers to slide down far enough so this version makes up for that

Bracket V2 is for very tapered mugs that rolled right up and over the tightly spaced default rollers, the slots allow for quick removal and reinstall in different locations

On both versions I would use 100% infill, it doesn't take lone to print them either way.