What parts for a flat tailcap for SureFire E series?

I'd like to assemble flat tailcaps for a TW4 (E1L body, KL4 head, one AW 3.7V cell) and an identical TW4 except with an OpticsHQ Cree head.

Are these the right parts:

http://theledguy.chainreactionweb.com/product_info.php?products_id=556
Aleph Flat Tailcap-Black

or

http://theledguy.chainreactionweb.com/product_info.php?products_id=557
Aleph Flat Tailcap-Natural (currently showing zero in stock)

and

http://theledguy.chainreactionweb.com/product_info.php?products_id=963
Assembled McE2S FLAT LOTC two stage switch

Assuming that the above parts are correct, what about the flat rubber boot? The tailcap also offers an optional $5 flat rubber boot, while the switch offers an optional $4 FLAT McE2S Rubber boot cap. Which one? How do these differ?

Also, I see that the Flat Rubber Boot is claimed to be "out of stock" when you check the Aleph Flat Tailcap-Black, but no such statement is made for the rubber boot for the Aleph Flat Tailcap-Bare Aluminum or the Natural. Is this Flat Rubber Boot actually available?

Finally, what resistor values are suggested for the above TW4 configurations to obtain a useful overall low mode -- say low enough to navigate outdoors, read something like a map, and look for something that you might have dropped in the dark, all without dazzling your night-adapted vision?

If I choose to convert the KL4 head or OpticsHQ head back into a 2-cell (CR123As for the KL4 and RCR123As for the Optics HQ) Surefire L4 configuration, what resistor values work well for that?

Thank you.

Yes we have the flat tailcap. Use the pull-down in the description to get the flat disc. It works with the McE2S FLAT switch.

I think people use the 22ohm switch. Anyone else want to confirm?

I use the 22 ohm switch for a KL4 driven by 1 rechargeable. You may want to go with a larger value when driving it with 2 primaries. I cannot confirm this though.

This old thread is OBE, but I'm using a 60 ohm switch. It gives a very satisfactory low for a KL4 driven by one or two cells.