Lumeniac updated his C8G runtime graph for the SST40 version. The driver is actually regulated. Efficiency and regulation looks somewhat similar to Convoy’s SST40 drivers (M21A), without more precise output measurements I cannot be certain, and falls short of the SP35 results (the SP35 test used a 4800mAh battery instead of 4000mAh but the runtime difference is much larger than 20%).