A T-Track guide for table saws. Fits and works well with Delta and Dewalt Table Saws.
Tested with PLA, others ought to work properly.
Best practice is to line up the rails while using a square or long apparatus to ensure that they are mounted in a as-straight-as-possible line
Not quite Zero-Tolerance due to multiple nozzle and filament types. but as close as can be with the basics.