Dear Archer,
This light is impressive in its brightness.
Some suggestions on how to improve the design of this light (some have been mentioned by others before), hopefully it can be fed back to the engineers and hope to see an upgraded light in future.
1. The light head is really too heavy. It is tiring and painful to use for more than a few minutes. Both me and my buddy who tried it have resorted to holding the light head itself in our right hand instead of using the goodman handle. My buddy had a Halcyon Focus, and in switching between these lights, the discomfort caused by the DIV 10 is very obvious.
2. The goodman handle is too wide. Shorten it to a typical hand's breadth to make it more usable.
3. If possible, round the edges of the goodman handle that come in contact with the top of the hand for improved comfort.
4. The webbing on the canister is too wide and loose. Most people use a 2" belt webbing for their BCD. The webbing on the canister should be just slightly larger than 2", and should be tight when slid onto the BCD's webbing.
5. The webbing on the canister should be shifted higher. Divers use the canister to capture their long hose, and the way the clamps are positioned now leave very little of the canister for this purpose.
6. A protected sturdy switch will be better than a press switch.
7. Canister lights are used for signalling purposes in tech/cave dives. A tighter 6 degree beam will be much better. The current beam is too wide.
8. The battery charger that is supplied with the torch is silly. It has 2 charging slots, when the light has 3 batteries.