both the kuzma and moerch have at least 4 counterweights of different weights which are combined to optimise their mass and position. By my maths that equates to 24 combinations in each case
the helius has 3 counterweights plus 2 small counterweights used in tandem. When you order a helius they ask you for the weight range of your cartridges to ensure optimisation.
the 6 counterweights for the Sumiko are quite crude by comparison