A few days ago member Nbabu send me a parcel with a lot of spare parts and lights. Some of them were working, others not. Two of those were hosts, as he called them, and they intrigued me a lot.
There was a “vintage” Convoy C8 (model with a pill) and a FandyFire STL-V6. And I started legoing a bit. And lo and behold what I got. For the time being I will call it a Fandyvoy. As you already guessed it: left is before, right is after. The “silver” Convoy C8 is only shown as a reference.
Though only 99% (give or take) matching, I managed to swap the tubes. And the Fandyvoy looked a lot more sexy than the ConFire (not shown) 
Then the entrails: the package also contained a matching pill and driver.
(pictures “borrowed” from a thread in 2014 by member G0OSE)
The pill had room for a 25mm ledboard, and those are hard to come by. But in my box of parts I found a 25mm brass shim of wich I enlarged the inside diameter from 16mm to 21mm. Soldering it in was done with a frying pan. I laid the shim in the pill and when then temparature was high enough, I just put a solder wire in the gap (temporary fixating it with screws, afraid the shim might float away).
The led I used is a 1mm² White Flat I got from Neven. Since I had no centering ring that spanned the gap between the 3030 emitter and the rather large opening in the reflector, I made one myself. Found a piece of round nylon somewhere that I flattened, and widened the opening a bit. Then I glued it onto the ledboard and made it black with a felttip pen. The centering stub only takes care of the centering. For focussing I use a plastic ring around the centering stub. It serves two purposes: the thickness permits me to fine tune the focussing, and it prevents the reflector touching the solder blobs on the leads. Atm I use a “shim” I cut out of the bottom of a plastic coffee cup.
Then the other side of the pill. Since I hate soldering a driver, I filed down the rim of the pill that holds the driver to a fraction less than the thickness of the driver. So the driver protrudes a bit. But it is firmly held down by a 3mm Nylon shim I filed down until it exactly fits the inside of the head. And it is pushed against the pill by fastening the tube of the light. The driver itself is left intact. I was afraid to stick my soldering iron between the two PCB’s so I refrained to shortening the leads by some 50% and bypassing the spring with 20AWG.
The outcome is rather surprising: With only 1.5A at the tailcap, from two Efest 18350’s, the hotspot has more impact than that of a White Flat with 5A in the silver Convoy I used as reference. I have not measured this, it was done the redneck way. Both lights shining on a white surface, and looking wich beam prevails if the hotspots touch.
No beamshots. I have ordered a “Green” Flat 1mm², and when that arrives, I’ll organize a shooting match.