For starters, Don, welcome and it's enjoyable to read your posts. Your posts read so nicely! ... [a lot of great advice and commentary] ... Again, welcome, and look forward to seeing more of you on the forums!
		
		
	 
 
Vee,
 
Thank you so much for your warm welcome and your compliment about the readability of my posts [you're going to regret that after reading this post] ... 
and for your magnum opus!

* <- Just teasing about that way of characterizing the length of your reply; serious about the appreciation of its content.
 
* Boy, I sure hope I'm using that "wink" emoticon correctly: to indicate gentle sarcasm or inside joke, rather than 
flirting.
 
[I tend to be verbose, myself. My emails read like mini-treatises, rather than txt msgs. In my 
other life (outside of vaping), I'm a professional trainer/speaker and author (on workplace management issues). My wife (who is my coauthor and/or editor) is constantly 
shortening my drafts ... 
and eliminating all my parenthetical remarks.

]
 
I have begun the process of investigating the 501 (with manual switch) and am impressed with what I'm finding. Thank you for pointing me in that direction!
 
I believe that my KR808D-1 (Easy Cig branded) is different than/from 
[I can never get that straight - some "professional writer" huh!] your former Red Dragon. Isn't that a brand of the Loong Totem or LTv9?
 
They both have integrated cartomizers, but my batteries are longer - total length of my KR808D-1 is 118 mm* , i.e., about one-fifth longer (and a bit fatter) than a 100's analog cigarette. Therefore they 
last longer before needing recharge. And, I believe, the carts and batteries of these respective units are just 
different (and not compatible).
 
* I 
think, but can't find info on this. My American-units ruler says 4.6".
 
Am I correct that your 510 (battery+atomizer+cart) is about the same length as my Easy Cig? [BTW, there is an interesting/illuminating comparision of our respective PVs in the 
Tips, Tricks, Comparisons - 510 and KR808D-1 thread in the Electronic Cigarette Reviews subforum.]
 
Be that as it may ... I have just placed a set of orders (to cigeasy.com and mist-stix.com) for more supplies (battery + lots of carts at slightly lower nic level) for my current Easy Cig. And I've ordered sample sizes (3 ml) of 
16 different flavored 0 mg e-liquid from nuvape.com (
lots of flavors to choose from at good prices and free shipping). In the short-term, I'll use the non-nic e-liquid to refill my spent cartomizers. Longer term, they can fill blank 501 carts. 
Then I'll build a chemistry set. 

 **
 
** My wife has been 
very supportive of my foray into vaping, but she has 
reacted a bit when I talk about 
mixing solutions of PG, glycerin, distilled water, and flavorings (
boom!) ... and about 
syringes (am I going to 
mainline this stuff?).
 
As for "PEG", according to kinabaloo** and MonkeyMonk** (in the 
If its not PG or VG than what is it? General E-Smoking Discussion thread): 
PG is propylene glycol and P
EG is polyethylene glycol (not to be confused with 
ethylene glycol, which is 
toxic 8-o).
 
*** Don't you just 
love the screen names we all adopt here.
 
 
I certainly respect your (and so many others') desire/need for higher nicotine levels! For me, however, in addition to having smoked somewhat less than a pack/day of UltraLights, a key reason that 
I need low nicotine level cartridges/liquids is that I am vaping 
so much more than I smoked. I plan on using 6-11 mg cartridges for my once per hour "cigarette breaks"**** and 0 mg cartidges for my chain-vaping (I'm very oral).
 
**** Actually, I called them "mini-breaks" with my wife (who hated my smoking).
 
BTW, as a chain-vaper, I like to switch off among various flavored cartridges. Since the flavoring isn't labeled on the cartomizer itself, it's difficult/impossible to keep track what is what. [Others and I have posted on this issue and possible solutions in the 
How do you label your flavors? and 
Anyone have an idea on how to label carts? threads (in a couple of other subforums).]
 
Well, this stream-of-consciousness has run its course (finally). [You realize that the only reason I went on and on was to make you feel better about your 'novel' (more of a 
novella or 
novelette really). Yeah, right!]
 
Don
 
DonBoldUser -> my Blackberry Bold, not a PV
 
[Vaping a KR808D-1 (Easy Cig) a few days now ... eliminated a bunch of analogs, but haven't saved any money yet ... yada yada.]