"If you've no clue what you're talking about...it's best just to not say anything at all"

-- Indeed -- but earlier in this thread you said

" Tungstens...haven't really a clue on that one". [no-one had mentioned tungsten but you decided to post to tell us that you hadn't a clue about something that no-one wanted to know about]

"Yes and no..... But in general, yes you are right"

"And if you blow on a hot iron....does it cool it down ?"

"Blow on something roasting hot.....how much does your breath cool it"

**verbal diarrhea**