A cyclone sand separator kit, method, and separator, of which the kit includes a cyclone body having an inlet, a fluid outlet, and a solids outlet, the inlet being configured to receive a mixed fluid including a solid portion and a fluidic portion, the solids outlet being configured to receive the solid portion separated from the fluidic portion, and the fluid outlet being configured to receive the fluidic portion separated from the solids portion. The kit includes a plurality of cyclone inserts configured to be positioned in the cyclone body, at least partially between the inlet and the solids outlet and at least partially between the fluids outlet and the solids outlet. The cyclone inserts each define a vortical section configured to induce inertial separation of the mixed fluid, have different geometries including different inner diameters, lengths, angles, underflow outlet sizes, vortex finder placements, or a combination thereof.