I made a remix of this. I add the bottom protection in order prevent the screw to damage the PCB on the back of the bed and made some wall thicker to reduce the flex.

Print the 2 parts and assembly using an M3 nut and max 10mm screw to clamp it to a bed + two M3x8 screws to fix the ADXL354 to the printed part. I recommend 100% infill for the small part (adxl-protection-bed) and for the bigger one, your usual settings, but more perimeters will make it stiffer.

If you have a thicker or thinner bed you could scale the big part in slicer on only one axe.