Yes, refer above
Oh, sorry. Weird enough that text was not seen when I read it. But now it is present in my quote.
Anyways I can not argue against what you said if you say it is not impervious but resistant. As for claims that others have changed it for personal reasons, I would not know. My involvement with WSLVT is still null. Just because I have found a club that study it does not mean I tried it yet.