As posted over at MTBR, I just ordered the "SecurityIng" version of this light from Amazon ($32.99). Then the next thing I knew my finger slipped and I also ordered an SSX2 
(due to ledoman confirming that the SSX2 driver will mount in this HD-016). This would give both LED's on (wide & narrow) at the same time with Low-Med-High modes and a hidden strobe. Lagman's review confirmed that the original driver also runs on 4.2v input, which really appeals to me (to use unprotected cells in parallel), so I am torn between keeping the original driver or swapping the SSX2's driver. (I really just bought the X2 for the driver.) I will post back with my findings.
I really think this HD-016 will be the perfect light for me! I can finally stop accumulating all these lights! (Yeah right! 
).
Thanks Ledoman! I should send you the bill!
-Garry