Cool, my SP10Pro is on permanent EDC duty, but I just wanted to see the difference in hand between the 16340 and 14500 size lights. Can’t really take the word of people online about feel in hand because, well, their hands aren’t my hands 
I might go for one anyway just because they’re so(firn) affordable. Just to see how it feels.
I like the shorter (but fatter) SC21 Pro size better than the SP10 Pro form factor. (both lights have the same carry weight)
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I also like the lighted button better, the clip rides deeper, and it tailstands better
Very nice - the reflectors are the same size, right? I think I heard that somewhere.
Any luck on finding a TIR that goes in without too much sanding or cutting required? I’ve got DC-Fix on my SP10Pro, but I’m curious if there are any other nice lens options.
actually no
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I do not have a good undetstanding of the Pebbled Tir Options… but yes, I have seen some photos
Ok thanks. Those are nice pinks
Pebble Tir info
Very interesting, thanks for that. Pity they aren’t the same size, because I tried the S2+ TIRs and they don’t work like drop-ins on my SP10Pro like they do in that SC21Pro. That’s another tick for me getting one I guess.
20mm TIRs are most common for these lights (S2+, etc.), but 17mm is another somewhat common size. Fits in D25 headlamps with minimal sanding, so see if one of those would do.
Only thing I’d be concerned with is depth. (That’s what she said…)
Well looky what showed up in the mail yesterday! I got one built up and tested, worked great. I’ll try to get some more built up over the weekend to be able to ship out.
Yay
I just got a new SC21 Pro today… I will be happy to use your new programmer and pogo pins, when ready.
the Programmer and pogo pins you provided for SP10 Pro also works on TS10. It has been working Great for me.
fwiw, the hex for SC21 Pro needs updating to lower lows, and to add LVP to the button light circuit…
in the meantime, would it work to use the TS10 hex you made, dated 7/19, on an SC21 Pro
the only difference I know, from using the TS10 hex, is the SC21 Pro button light will be Off when main LEDs are On… no harm in that. But there is a lot I dont know… lol
Any reason NOT to put TS10 firmware on SC21 Pro?
Jumping in the pool here without reading this whole thread. I’m interested in updating to Anduril 2, so I’m interested to hear the response to jonslider’s q in the previous post.
also, my programmer is rather different than ones I’ve seen used recently.
How can someone guide me to instructions how to use this programmer with the SC21 please?
I see no reason not to put TS10 firmware on the SC21 Pro. I’ll be the guinea pig and report back.
Sorry, sbslider. That’s a USBasp, great for the attiny85 and attiny1634. But not compatible with the attiny1616. You’d need a USB to Serial TTL adapter like what you linked to above. I’ve got some on hand that I can send out with pogo adapters, or they’re available on Amazon
step 1. buy the TS10 ProgoPogo from gchart
2. here is a tutorial:
word is avrdudess also works… I cant say… my Old Mac has a brain of its own
good luck,
for me learning to reflash without prior experience… was a total cluster. I killed 2 lights in the process (I call it a Seminar Fee), almost more than Ive killed modding… lol…
I dont have your background, it may be like frisbee golf in Alameda Park for you
Ok, thanks for the clarification. I’ll PM you regarding specifics of the programmer and adapter.
Confirmed: I just flashed the TS10 file to my SC21 Pro and it’s working great! Lower lows and all.
you Rock! thanks gchart! 
Thanks for the link jon_slider, but for some reason it doesn’t work for me right now. If I copy the text of the link and go there it does work. Weird.
I’ll likely slow roll this one for now, sort of like my standard tee shot at hole 4 of Evergreen Park disc golf course.
No disc golf at Alameda park, too many folks hanging out there for that activity. Would be nice though, as that’s much closer to my house. Back to the topic, I think the thing Anduril 2 has that I would am most interested in is the timer feature in 5 minute increments for sunset, so for now I’ll watch this thread and see how things go for folks.
glad youre on a roll… 
the link is too long, thanks for the heads up, glad you figured it out… edited my post so its not a raw link… this way works:
I want to try my hand at first time flashing - so if I follow those instructions from the reddit post - with all those parts, it should work for the SC21? I am a complete newb at this but willing to learn.
yes and no
yes the programmer for the SP10 works on the SC21, but the pogo pins are different
this is what the SP10 setup looks like:
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on the SC21 Pro, there are 6 flashing pads, on the SP10 Pro there are 3 flashing pads
gchart built a Pogo Pin Adapter for SC21, that looks like this:
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so the pogo pins can reach flashing pads number 2, 6, and 1 on the SC21 Pro
you can also solder the wires to the SC21 Pro flashing pads, if you dont have pogo pins