Can someone please give me some hints what this red material (marked with the red arrow) is about, what it is good for and where to buy it for DIY-projects?
For the thinner wires, I can understand - adds support to remove strain and keep the wires from breaking or strands splitting. Also good for preventing shorts - excellent application because I've seen these small gauge wire solder joints fail before. The red stuff is also used on the back of the switch PCB for the wire solder joints there, btw... It can be a PITA when those short or break.
For that 2P2/2R2 part, maybe electrical isolation (short prevention) or perhaps thermal usage.
I dunno about where to buy, but perhaps later I can get confirmation from an EE on all this. We most likely have stuff like this here at work, but right now our tech position is vacant.
Yep, that appears to be the stuff! MG Chemicals is high qual. I've used their stuff before. Interesting Sofirn did things by the book here, or even beyond with extra care. That big part I'm pretty sure is used for the charging circuit, so from my experiences in blowing up (ahh, attempting repairs) chargers, I'd say this type of thing is commonly used in charging circuits, and there is a bit of juice going through these parts. The description of the red varnish is more for electrical use (arc prevention) rather than heat - dunno how that applies to that part.
I used this code back on Dec 31st at BG: M**** great price (best), but forgot where I got the code or if it's still good -- think from Martin? Problem is BG is saying backorder til Jan 28th
That sounds like a nice upgrade from the cool white version. XP-L2 and XP-G3 both have a pretty strong rainbow effect though, where different parts of the beam are very different colors. People typically prefer something with a more consistent beam color, like XP-L HI or LH351D.