Well, since you asked, a few random observations, some of which were already posted elsewhere, in no particular order -
1. Here is the final parts list that I used for 17mm 1S:
U1: ATTiny25V
U2: SIR800DP
D1: RB751V40T1G
D2: none
C1: 1uF (0805)
C2: 47uF (0805) 298D476X0010P2T
OTC: none
7135: 350ma
R1: 1K (0603)
R2: 3.3K (0603)
R3: 100K (0603)
R4: 47 (0603)
R5: 4.7 (0603)
BR: none
There are cheaper/better options for C2, but I don’t know what is the best option there.
2. Moonlight is crazy low, more like a firefly/sub-lumen mode. I changed my modegroups around to use ramp level 2 instead of moonlight.
3. The tantalum capacitor is polarized. I posted a picture of the working orientation in a previous post.
4. No bleeder resistor is needed for lighted tailcap builds (at least on 17mm 1S). All of my Convoy S2/S2+/S3 builds have them.
5. There is some occasional odd behavior with short presses. If you haven’t turned the light on in a while, and immediately tap forward rapidly a few times, some of the forward taps will behave as medium-presses. This clears up within a few seconds and won’t come back again for a long time (several days? Need more time to figure this one out).
6. I managed to destroy a bunch of 7135s by soldering them by hand with an iron. I discovered this when doing tail measurements with a multimeter. Apparently the little things can’t handle an iron at 650F. I replaced all of them with fresh 7135s and reflowed them using solder paste and hot air, and everything was fine after that.
7. Since I was doing a bunch of projects at the same time, I used the electric skillet method for the side with the tiny components. Works great! I usually use hot air for SMD, though, especially after the 7135 incident.
8. Convoy S2 and S2+ pills do not work very well with 17mm TAv1 drivers. You need to either file the retaining ring way down or solder the drivers in place. I tried to solder one to a S2 pill and the heavier components on the other side of the board fell off. I have read that some people have had success with using a blowtorch to pre-heat the pill, but I haven’t tried that. The Convoy S3 has a wider retaining ring and works without any fuss.