for starters, Tmater has part of your answer, beyond that you seem to be unable to find the forum you're interested in, but it is there, ask them about their articles ... the internet is an ever changing thing, we can't keep track of all of it ohwell

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot