D-Bot heated bed jack
thingiverse
Simple solution for low-profile beds, mine features a concave center which can be leveled out using this approach. Add thermal insulation to the pad section (cork, neoprene). Secure an M5 nut and its corresponding screw to the jack portion. Utilize two 8 mm rigid pipes/rods for added support. Position the supports with t-nuts and screws in place. I strongly advise against using PLA for the pad section, especially for the pad part.
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