Thanx Pete. Yes, i'm sliding the tubes back over the plastic. I think i might've figured out at least part of the problem: The butterfly fixture seems to have been bent at some point (probably during shipping). I played around with it with what little time i had today and it seems much better.
I do have one really stupid question (i know, there are no stupid questions, just stupid people

): The tubes slide over the top of the butterfly fixtures, right? It didn't seem possible for the thinner part of the butterfly fixtures to fit inside the aluminum tubes, but just thought i'd ask to make sure. Thanx again Pete
