Hi Emily Joy,
This is a Migraine site, and as such, there are a few cluster headache patients here, but they may be a bit tough to find. It may take a while to get an answer to your question.
What might be helpful for, is to know exactly which type of neurostimulation you're getting. There are several types, and a brand new one especially for cluster headache that is ready to be approved at any moment now. It is even wireless!
~Ellen