This is what I am trying to get at. What is 'better design'???

Different manufactures have 'different designs'.

It does not matter what 'design' you have. If your too low, your gonna do damage. Weather you damage your UCA or put a hole through your tower, its not good. How many times do I need to stress this?

Yes I do have these UCA's. Defending the product I am, yes. Have I had a problem with this product, no I haven't. It is just proof that they do work 'perfectly fine' as long as you use them in thier confinds and are not excesivley low, as with any other UCA.

Safety first, don't go to low.