A Parametric Heatbed Bracket
Originally designed for the anycubic Ultrabase, but you can use this for all kinds of heatbeds.
ABS/PETG recommended. PLA can work, but it depends on the quality of your material.
Don't attach PLA brackets to an Ultrabase that you plan to heat up to higher temperatures!
Can be opened in Customizer/OpenSCAD, so you can tweak the width, height & depth yourself. The supplied STL is what I ended up using on my Ultrabase,
Printed at 0.3mm layer height and 100% infill.
The Ultrabase is glued on to the heat-bed below and has a tendency to dissolve from it after prolonged use.
This bracket makes sure the glued on base sticks flat and evenly to the heat-bed.