Don't buy that one. It does not fit. I will look for the right model # and post it. Darn it!!!!!!!
From what I can tell it is the BL-166. When I get it I will check it out.
I gotta say, that LED centering sucks though. 100 bucks for a light and they can't do any better than that?!? I'd at least send that picture to the seller and ask if this is typical. They might exchange it for you, if it bothers you.
Just got notification from the company that the Ripoff Bl-166DS is the model that will fit the Fenix TK 41. Just got the 41 in the mail and could not be happier. Will check it out tonight and see how she works.
I told you Shane is fast. He's awesome to deal with too.
You sure did ILF. I think anyone wanting to buy Fenix would be crazy to not use his services. He gives a special price to members of flashlight sites. He beats any price I have seen. Can't wait to order the TK 70 but that will have to be next month according to my financial manager (wife).
+1 on Pro-Tactical Shop.
I'm really excited to hear more about the LD50 pumping out 650L on 6xAA. 
Anyone know of a good deal for the TK41?
It looks like I can get one for about $110 on eBay, but I think I remember someone mentioning that it could be had for about $100 somewhere.
PM sent.
Just got the Ripoff BL-166DS and it fits the TK 41 perfectly. Pretty good quality and I am totally satisfied with it. I like that the top strap goes over the lens and has a velcro closure. Very satisfied.
Fenix jsut released a diffuser for the TK41. Check it out: 
I know where you can get one for around $100 shipped.
I think the TK41 is the best C-note you can spend on a torch. Wish I could afford one to keep in my car as well.
And those are some nice cars.
Just went out and tested mine for the first time. You guy's were right on with your advice. The TK 35 has pretty nice flood and range and is excellent for that purpose but the TK 41 has a tighter spot and greater distance. Mine has a white as white beam and I could not be happier. I was so thrilled with this lite I ordered the TK 70 tonight from Shane. Oh boy here we go. I think the TK 41 is a go to lite for sure.
Glad to hear how much you like it!
P.S. Thanks for the PM!
would you prefer a tk41 over a sunwayman v60c and why (not)?
I believe so. The Fenix TK41 is just a very nice light. I can't say the finish is better than on the Sunwayman flashlights. But the rectangle cutout machining on the body tube really sets this light off. And the led is perfectly centered. And I love all the modes that it has. The V60C would make my top 4 picks of best lights to own. The Sunwayman T40CS and Olight M3X would be in that top 4 as well. And actually the T40CS is my second favorite flashlight I own right now.
Misfire,
Could you PM me the place you got your tk41 from? I have been looking at that light myself and was trying to get it at the best price possible.
Thanks