I received my light but the switch is not working. I can activate the light and switch modes by shorting the body to the negative terminal of the battery but when put together, it is DOA. Has anyone else experienced this or have any ideas on a fix? I did try installing a McClicky in the tail cap and it half-way worked but not reliably. There must be a contact issue somewhere but I cleaned all the surfaces and made sure everything was assembled tightly with no luck. I just want to say that for the money, if I can get this thing working, this will be a killer light! Fit and finish are very good and the output is very impressive! I hope nobody else has any problems with theirs!