"I'm not assuming anything. doni is a contractor, not an engineer. He's read some books. He has some opinions. Just like everyone else on this board."

Unless doni's shared his life story with you, and you know him intimately, it is indeed just "your assumptions". If you are correct, and he has no "formal education" in this field...well there's plenty of them out there who's opinions just might be more viable than others...some of the more famous include: Franklin, Washington, Lincoln, Andrew Carnegie, Henry Ford, Sam Walton, Bill Gates. Some folks look down their noses at those with no formal education. Personally I "try" not to underestimate others, nor overestimate myself.

You quote others opinions and intimate (sometimes "seems like" you're alluding that you have inside info) knowledge about edig a lot without disclosing who they are, what their education and qualifications are why they feel that way etc. What happened to all the transparency and facts you insist on from everyone else?

Coyote