Dear BLF,
Recently I have switch to LEDs but I have a MAG using light bulb with a 6Ds alkaline body that been with me for quite a long time.
Now I want to upgrade it using led since I don’t want it to be abandon.
As a newbie, I wonder is it possible to upgrade? If so, what part and where should I get them if I want the max out put?
I know a dealer here that could do the modding for me, just want to get some ideas from experienced BLFers first before taking action.
Thanks!
You can just get a LED module from Terralux or Malkoff 
Or a pilotptk module and a heatsink. :)
Do you guys know exactly which one I should get? Link would be appreciated!
And yes, the old Mag has a pretty shallow heat sink around 0.8cm. If we replace the heat sink as well, should the head fit?
6*1.2 (assuming he’ll use NiMH’s) = 7.2V, PPTK’s module requires min. 9V 
(Although he could use a dozen of 1/2D cells for 14.4V… but that’d be crazy!)
I found Ministar31 on Teralux, but man it cost 99US!
Malkoff looks cheaper at 39us, which one better ?
Wow, found the Mag that Jayrob mods is awesome, don’t know how much it cost for his drop in?
The Malkoff would be a great option for 6xD alkaline cells since it has a good driver. Up until a few months ago they were going for $69 plus shipping. For $39 plus shipping it should be an easy and reliable way to bring your 6D up to date 
If you're looking to use a simple drop in like the Terralux or Malkoff the first thing you need to do is check the serial number on your light. If it starts with a "D" either is a simple drop in, if not they will most likely require a bit of work.
I have a 2D Mag using 6 Eneloops and the Terralux TLE-300M, 3D Mag using a 5 sub D battery pack (Mag Charger battery) and the Terralux Ministar31, 4D Mag with a Malkoff with a Mag Rebel deep reflector (both smo or op depending on my mood) and a 5D Mag with the older TLE-300.
A few thoughts/observations:
The Malkoff quality is exceptional, the heat sink is as good as you'll ever find in a drop in. It has great throw with good spill. Rated in otf lumens! The only down side for me is it's single mode. It's a very easy drop in if you use the original reflector. I wanted to try for the most throw hence the Rebel reflectors. To get the reflector to fit the head I had to cut the switch down. About an hour for an amature like me but I'm happy with the results.
The Ministar31 quality is very good but not at the level of the Malkoff in my opinion. I gave several of the TLE-300Ms to State Trooper friends of mine about two years ago and they're all still going strong.
I've heard people complain about heat management but I've used thermal paste when installing mine and had no problems. The reletively large Mag head gets toasty very quickly on high and I've noticed no dimming even after 30-40 minutes on high.
The beam on the Ministar31 is a huge spot with no spill. Not really a flood light as it will throw due to the volume of light but no spill to speak of.
I'm going to try to post a few pictures that may be helpful. Unfortunately, I don't have my Ministar31 light tonight. The lights will be the 4D with Malkoff (I believe rated at 260 lumens) and 5D with my oldest Terralux, the TLE-300. By the way, the Ministar31 is 3 mode.
Before I post further pictures I need to enter a disclaimer: I have not yet taken the time to learn to take proper pictures. I have a very nice Nikon DSLR but have not learned to use it beyond my daily needs. These pictures were taken with my 12 year old Sony Mavica. White balance, f/stop, exposure, might as well be Greek to me. Since I'm posting pictures for a fellow BLFer to compare drop ins I thought I could cover my inability with a camera by photographing a wall shot with both lights on but I was wrong. One of the drop ins came out looking like a wimp! A trickery of the camera, they are both very bright, so...
The Malkoff
Don't know why it has that green color in the picture, I would call it neutral to my eye, a very nice tint with great throw. This is the op reflector. The smo reflector is more focused but obviously not as good a wall hunter.
TLE-300
The Ministar31 does not have the funky star pattern, only the large spot of the TLE-300. The 31 is also a warmer tint and I don't remember seeing the tint-shift, darn, I wish I had it here! Oh yea, while the TLE-300 was rated at 600lm the 31 is rated at 1,000. I don't know about either of those numbers but I know it's brighter!
Hope this helps, and I hope this time when I hit "save" it works. The last time I tried to post on BLF I ended up with a massive post of blank space. Wish me luck!
(edit) Forgot the side by side,
Will this drop-in work with a 6 AA or 9 AA config in 3 or 2 D Mag?
http://www.batteryjunction.com/terralux-tle-310m-ex.html
I’m thinking of putting these oldies to use.
I have the TLE-300M installed in a 6AA Eneloop Mag, same voltage requirements. It will also work, and I have the Ministar31 installed in a 3D Mag using a NiMH 5 sub D battery (MagCharger).
Cool. WIll this mod work in a 2C with two 18650s or only 2D?
Btw, your sig is so true!
Thanks Intinifni for the review, I probably stick with Malkoff. It has nicer hot spot IMO and better probably better throw.