Hey Simon! Would you consider making a tail switch for the S21E? So it would add a more tactical feel to the light? With a forward switch?
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That’d just be an S21A
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S21A does not have a side switch. I would like a dual switch light.
Hey Simon there’s been some talk about build quality of flashlights on Reddit and I was wondering what grade of aluminum are your lights made of?
Hi Simon! Can you please add the s21g ti+cu on AliExpress?
Just sharing this here for everyone to see and share their thoughts. I have already messaged Simon about this new two piece gasket that I designed. This fixes the issue of using square shaped gaskets that risk tearing the LED from the MCPCB. The outer ring rotates with the reflector and allows the LED to centre correctly without any risks.
@Simon_Mao This is how to fix the off-centre issues. Your round gaskets are difficult to centre and the LED corners scrape plastic shavings which cover the reflector and lens. Using these round gaskets you leave the MCPCB screws loose which have arrived rattling around inside. If you aren’t going to tighten the screws then replace them with plastic pegs, it’s safer.
I’ve spent 20+ hours on this so far and would appreciate it if you took a serious look at this gasket.
@ebastler drew up a model on Fusion 360 with an alternative version that I’m still testing, to see whether it’s suitable. Thanks for your time and effort to help me out 
Holes added to see movement
Top View
Bottom View
Pegs I use to replace the loose screws. Just to prevent the MCPCB rotating. The thickness of the gasket applies sufficient force to not need screws.
Here’s the 3030 version and plastic pegs. Works really well.
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Very cool design! Way to go!
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Great! Needs a good name PTD gasket or BLF Gasket or something 
Is the internal circle the same diameter for different reflector/LED combos? So you can (within reason) mix-n-match a 7, 8, 9, 10, 11 mm hole with a 3030, 3535, 4040, 5050, 7070 led?
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That design just allows up to 5050 size emitters with a 9mm reflector hole. It would need to be adjusted for a larger reflector hole thus changing the diameter of everything.
Yes, same size centre ring for up to 5050.
I don’t find the need to use this design for larger emitters, I just had enough of the 4040 and smaller being off centre, so I bought a 3D Printer specially to print my own gaskets.
Currently the L21B CSLNM1 uses a 5050 gasket, it’s a nightmare.
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This is amazing! I believe that this is the one thing that Convoy needs above all else–it improves the usability and reliability of their lights by leaps and bounds, for a minimal cost.
Simon: please, please, take a very good look at this.
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Simon please consider this!!! It would fix the persistent centering issues that prevent the emitters from reaching their full potential.
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If it helps any, there are nylon screws that could probably be used to replace the metal ones. They’d still thread into the host to secure, but couldn’t short anything out if they came loose. Assuming someone makes the right size of them you could just buy them by the box, rather than have to custom print pegs. A quick google says nylon doesn’t melt until 515F (268C), so that should be alright too.
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Thank you.
Yes, I bought some and was using them, but they weren’t as easy to screw in as metal. Convoy flashlights are an odd one because having the emitter looking centred often isn’t, many times I have to press the MCPCB all the way to the side if I’m tightening the screws for the emitter and reflector to perfectly centre. It’s as if the shelf has been machined off-centre. The only way to easily centre an emitter is to use pegs or leave nylon screws loose.
The quality control of Convoy is problematic, but this gasket is the best way to make things a little easier.
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What I found from performing at least 50 re-flows, is that the emitter itself has a bit of play on the MCPCB. If an emitter is soldered off-center on the PCB, then the PCB itself had to move in opposite way to compensate. This is fine for single emitter lights, but can create bad problems for multi-emitter light. An off centered emitter can be damaged by the optic since the dome can be pushed by the optic. In the case of 519A, a misaligned emitter dome can even be sheared off by the optic.
Furthermore, the emitter can also be lifted up on the Z-axis by using too much solder. So whenever re-flowing, be sure to press the emitter down with a q-tip to squeeze as much solder out as possible and wait for it to solidify before letting go so the emitter sits down on the PCB and doesn’t screw with focusing.
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That’s quite possibly the issue. There’s approx a 1.2mm space around the PCB, no cslnm1 is ever soldered that far off-centre though, if it was that far off it most likely wouldn’t be functional. I feel there’s something else at play here.
Hey @Simon_Mao I love that you added a black clip! Planning to order several. Now, do we have any chance of getting a tactical tail in white MAO? 
Hi Simon, do you have any plans for a slimmer battery tube for T5? Like the one in pink T3 and T6.
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Shout-out to Simon’s SFT-25R 5000K bin. The tint is so crazy good. Side by side it is rosier and warmer than 519A 4500K, like what the heck is this beautiful slightly warm and rosy light that’s coming out of my C8+! Gotta buy more just to stock up for later use. Sorry no photo, will post the beam later tonight.
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The optics must be playing a role. I only tested one in a C8+ reflector. It is very homogenous in tint. I have another one that I plan to put into a S2+ host with a 5 degree spot TIR to make a pocket thrower. I will compare the beam quality between those two. In theory a deep reflector should make the beam better since it collects more frontal output to form the hotspot.
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