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(A) Two possible shaft designs containing 64 and 32 electrodes. The maximum number of total electrodes is 256.
(B) Three possible electrode layouts. Left: linear, middle: staggered, right: honeycomb.
(C) Four possible shaft spacings.
(D) Three possible shaft lengths. The default length is 7 mm. The maximum possible length is ~ 18 mm imposed by the reticle size.
