About 6 years ago I bought a River Rock light (pictured below behind a Solarforce for comparison) that is still one of my favorite form-factor lights. Hefty, solid, smaller than a Maglite but bigger than a P60 style. I would love to mod this light. It has a convex lens that throws a very blue but very defined beam, almost like a spotlight, but it is quite dim and does not throw far.
I emailed River Rock and they said : "We do not have an upgrade kit for our lights. Typically, the head is attached with Loctite so it cannot be removed. I have seen a few of our other lights where a user replaced the LED with a new one but they knew how to match the LED power correctly and were able to solder it in place without damaging the circuit board. Not an easy modification.
I tried to get the head off the body in a vice, but only succeeded in scoring the knurling on it. Anyone who has ever messed with one of these, I would appreciate your help!
At work, i sometimes use a heat gun to disassemble parts that are put together with Loctite. Be carefull not to burn your fingers, because the Loctite has to be very hot, and aluminium is a very good heat conductor...
On the bigger parts i use a blowtorch (oxigen + acetylene) instead of the heat gun, but i don't think that will be fine for the anodising on the flashlight. (It can also melt the aluminium of the flashlight in a few minutes...)
