"Unintentional" sub-balancers found in balancers can be replaced with equivalent sub-balancers. [virtual-signal=signal-1] E.g. if you take two 3-3s [virtual-signal=signal-2] and combine them into a 6-6, [virtual-signal=signal-3] you may find a new 4-4 ([item=fast-splitter]) inside it. [virtual-signal=signal-4] You can replace it with another 4-4 (in this case, changing the input belt pairings) and the balancer will still work. In TU balancers, only TU sub-balancers can be substituted.