No prob asking lots of questions, ront!
The "natural" HA is the same finish as your L4. Be aware, however, that there are slight tint variations due to the material used (they're all aluminum, but different batches, etc. so the anodizing results won't be a perfect match); this is considered normal and doesn't affect performance.
The higher the resistor value, the lower the light output you'll have while on "low". The resistor is bypassed on "high", so you'll get the same output as if you didn't use a 2-stage switch while on high. Which one to choose/recommend is really tricky because we all have slightly different preferences and use our lights a bit differently.
From the 2-stage switches I've used, I find 22-30 Ohms is about right for my uses, but let me qualify that as follows. If I wake up in the middle of the night (eyes are completely dark adapted), I find 22 Ohms on the verge of being too bright for 1-2 seconds; I'm fine after that. The "shock" is not as bad when I use 30 Ohm. On the other hand, if I start using my light with non-dark adapted eyes, I can see better with 30 Ohms than with 22 (might be slightly "dim" for a few seconds, but then my eyes compensate). Now, the two-stages I have setup are lights with a 3 Watt Luxeon (LuxIII) light, not a 5-Watt (LuxV) such as the L4, so the total amount of light we're talking about will differ).
Did you get a chance to read those Sticky threads on the McGizmo forum? Kiessling posted some nice pics of all the different styles the tailcaps come in (there's flared, and flat-top, trim, etc.
:laughing: I knew I'd forget something.
Follow the "CPF Specials" link in my sigline, and from there go to OpticsHQ. Make sure to read the ir "membership" instructions carefully (there's a link in the specials thread) to make sure you get full advantage of our discounted price.
sssh: You won't find cheaper prices elsewhere.)