I don't boil rayon but that's just me. I know there are others who don't but that said I don't see anything wrong w/it- and if it makes you feel better, by all means do it!
I see nothing wrong w/keeping the Ecowool around and I would advise anyone who is switching to rayon to do just that. Just like many things- there are those who like it and some who never seem to get a handle on it. This is more from becoming habituated to cotton I believe, and if you've been using EW, that just means you'll have less cotton habits to "unlearn". The main things to keep in mind is the coil needs to be filled tighter with rayon because unlike cotton that swells, rayon actually settles some and if the coil isn't filled enough, when the wick is wetted w/juice, it may be a bit loose. A loose rayon wick can give a harsh hit from the juice burning off the coil- you're not tasting the wick burning. You can go too tight, this mutes the flavor and has a tell-tail "nutty" taste. The nutty taste may subside after a few pulls if it's not too tight.
The other thing is the tails need to be thinner than what most people wick with cotton use. Tails too thick causes the juice to be pulled away from the coil and this increases the coil gunking. You'll probably have questions after you try it, feel free to post them here.
I have found in my Kanger and Pro Tank builds, when I get the nutty taste at the start it's going to be a good wick. To get past the nutty I'll blow back through my atty three or four times letting the mod time out and shut off, really creates so fog LoL. If it's still nutty after that, I've stuffed way too much and it's likely to go south after a day or so. If the nutty is gone after the first few rounds it usually will pick up even more in flavor as it breaks in further. That's been my experience, YMMV.
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