Yeah, that was my problem...the slider I am using is part of Turb's package. It seems to work well enough, but the reference on the wiki doesn't say what the range is. The forumla I grabbed is from the original TheOneBag code. Looking at the math it seems that the value should be 1 -100, but it doesn't seem to trasition properly when I use it. When I modify the opacity manually in TheOneBag the scale is from 0.0 to 1.0.
I will try to impliment your code tomorrow (I am at work now). Thanks for everything.