It might be necessary to add a layer of silicone to the bottoms of stands to avoid 3d printer moving. Add a bit of silicone or gasket adhesive and cover the bottom with shrink wrap. Flatten gently agains't surface and let dry with the shrink wrap still on. Remove shrink wrap and let dry completely. Also probably need 6 for a Cartesian printer 2 on X and 4 on Y axis to get enough friction and avoid "squishy" silicone sounds. 100% infill print as presented. Dimensions of springs used: spring_od = 8; spring_id = 5.5; spring_z = 21;