I agree johnr 100% ! With the need comes the answers and the change. Without it we would be writing letters to each other on the topic. My comments on engineering should not be taken that I believe they all have horns and tails just some of them , I'm blown away by how far the industry and society has advanced since I was trained on carbon pile drive systems... you stop laughing right now ! I have training and experience with Tier 1 2 3 but I'm still trying to figure out the how 8 track tape worked...kidding , I reverse engineered a few to get the answer. Trex ?