There are a lot of folks in the industry here. It is nice to identify yourself (your commercial ties) in your posts as you did above, but it is not required by the rules as far as I know. Always nice to have experts. Vibration control(resonance?)is an interesting area.
I think most commercial folks feel welcomed here and most have a good experience too. If would be futile to try to keep you guys out with rules because the dishonest ones would just just shill and the honest ones, from which most of us amateurs can learn a thing or two, would not contribute.
The moderation guidelines suggest that "Posts that are obviously trying to sell something" will be rejected. They are found
here.Welcome
I remain,