McMaster-Carr is my go to for hardware: https://www.mcmaster.com/
what type of m5x30 leadscrew did you order? i believe the stock use ball screws
I'm embarrassed to say that I don't know what a ball screw is. But, I've gotten screws and split washers, and that problem is resolved. The printer isn't usable, though... it's trying to print in midair instead of on the bed. Separate issue, which I've been ignoring for way too long.
no worries! does it go through an autolevel probe before every print or just when you do it through the UI? if not you just have to go into your start gcode (in cura its under machine settings in prusaslicer its printer settings, custom gcode, start gcode) and add a G29 a line below your G28, thisll add a leveling before every print but itll also save the level so it actually prints correctly
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