So sorry to learn your not happy. I've had many lights and my d25c titanium is one of my very best. Fantastic! Also have D25a. EAGTAC is correct.
I do notice a couple a minor machining marks but find their lights to be superior to most other brands. Both of mine have great beams.
As do I. Build quality and feeling of having a precision instrument in your hand makes it without question:
D25C.
You can find fantastic specials on the titanium version presently. Just great! I'm writing from Hong along, took only one light on a two week trip from usa. D25C!
Have been here since the 10th but have to return to the states Friday. Congrats on the strong launch!
(two small edit suggestions. One is to also put dimensions in inches. Second is that you have two spellings for Shenzhen...)
It's the same as 2.1 with the addition of flexibility for lighting up the readouts for a longer time. No difference in performance. I'm in the market for this one too and hoping for a better price. Can be found on eBay for $30.
For those interested, ToysRUs has them again at $8.99 less 40% on second pack, meaning $7.19 a pack. Order online and pick up in store.
Quite the deal.