Couple dummy cells possibly… or just one wire. Seems like an easy, reversible mod.
I must be a bigger idiot than I knew, one Luminus CFT-90 will be delivered here in 2 days.
What will I do with it? Remains to be seen…
But now we have the Acebeam K75 with a SBT-90 GEN2 a cheaper/better alternative to having to makeshift a light to fit the CFT-90.
A cheaper and better alternative? At $321 for that light? The SBT-90 is still $73 and the die size is huge by comparison.
I won’t reconfigure a light to fit the CFT-90, I’ll reconfigure the substrate of the CFT.
Or I may just build a light from scratch to work with the smaller die CFT…
I thought both CFT90 and SBT90 were 9mm2 die sizes and similar outputs.
Not at all, the CFT is the White Flat equivalent that can draw well over 20A, even 40A!
The SBT-90 is the 24 bond wire glass window old school giant die, modernized. They recommend 9A for it.
The SBT-90 G2
The CFT-90
According to Luminus nomenclature and pdfs for both sbt90 gen 1 and cft90, both emitters use 9mm2 dies. So unless cft90 second gen is larger, then it should be 9mm2.
SBT90 gen2 can definitely take more than 9amps of current. I saw some numbers for it on the K75 topic that it ouptus 4600 lumens with 18amps draw. The K75 outputs 6300 lumens with it, so it’s capable of drawing well over 20amps, just like the CFT90.
Yep, you’re right… both have a 3x3mm die surface. I think I saw something about the new SBT-90 Gen2 and was going to buy that one but I had a bookmark on the CFT and blindly bought it instead! After I bought it I thought about cancelling the order but again when I checked the order I THOUGHT the CFT was the correct one… my memory is SO bad!
It’s ok though, the CFT is the more efficient and powerful of the two according to Luminus so I’ll deal with it. Sure would have been simpler to flow it to an MTG2 MCPCB and move on… which is what I hoped to do when I heard about the Gen2. Maybe I was disappointed that the SBT-90 doesn’t have a circular die like the SBT-70…
Can you buy the SBT-90.2? I looked but could not find it…anybody got a link?
I was under the impression you couldn’t buy an SBT90 2nd gen anyway (yet) - I have read that they are brighter and more efficient than the CFT90, well that’s what I’ve been reading on the two forums. I originally said the K75 because I’ve read that the led is $100+ (and probably more for the GEN2) and a driver is $90ish so your scraping $200, so a little more and you got a whole light - They can be had for $280, kind of a no brainer IMO.
The CFT-90 also has a benefit - the thermal performance will be better because of the factory pcb (the die is mounted directly onto the pcb).
Instead of dealing with the offset I am considering mounting the CFT with the die centered onto a piece of bar stock and then turning the factory copper base to make it circular, of a fashion. In this way the plugs and such will be removed and it will be far easier to mount in a light.
A friend is trading me his TN42 for this but I don’t know yet if I will indeed use that light. I’m actually thinking of using a smaller light, maybe even a solid copper light… will just have to see how it plays out as I go along. Absolute throw is not, necessarily, my goal. Unique is typically a major factor when I’m figuring these things out. 
The 30T seems well suited to this emitter, will probably favor it in my thinking…
The CFT-90 showed up today, impressive looking set-up! Bigger than I thought, for the most part (figured on the base dimensions but wasn’t grasping somehow that it’s still SST-90 sized) guess it won’t fit in my BLF SF-348…
Hey, CRX made a MT-G2 fit in a SF-348. I’m sure a bit of delicate grinding can get you there. 
So, now that I have this CFT-90 running I think I will test it with a 200mm condenser lens and see what that looks like.
Deathray!
I would add a pre-collimator in that case. It will easily double the size of the spot.
I’m curious what it will look like
I already know what it feels like, like 3 pounds of solid glass!
Back when I was working with MEM on a couple of projects he pointed me at the 200mm Condenser lens and I picked it up pretty cheap. I then found a zoom lens from Canon on ebay that was broken and bought it too. When the lens arrived I took it apart and retrieved the very nice aspheric lens it held, to be used as a pre-collimator lens in front of the 200mm. This about halved the focal point which is great, the 200mm lens has a 16” focal length! But yeah, it also greatly enlarged the hot spot. So I’ve been looking forward to building a “bazooka” for a while now, even have some 8” Sonotube to enable it to happen. Will probably buy some Aluminum tube to make it better, but…
I had thoughts of fiberglassing the cardboard Sonotube, painting it military green, mounting a sighting laser on it and a peep sight, literally make it a shoulder mount bazooka! 
2.4025Mcd
That’s holding the condenser lens out in front of the CFT-90, manually, open air.