Hahnemann says in the organon that you give a c scale potency for verification of the right remedy and then you go into LM. Just like any other potency, you do not repeat till improvement has stopped. H gives plenty hints that such is only allowed when necessary, for it will either palliate or aggravate. All potencies are useful in situations that call for them, witness the fact that H. used all, till his last days of practice. LM does cure much faster, as I have noticed, yet I find that preliminary work with the C scale has its usefulness.

Korsakoff, made his follow up potencies in the same bottle, while Hahnemann used a clean one for every potency. Korsakoffs method is less wasteful. The sinus curves of the energy of a 200K and a 200C are slightly different, but their action is virtually the same.