Alegria
"FX Chains 2.0 – Customizing your GUI"
Dimensions:
While you can import files of different dimensions, doing so will cause the chosen image to stretch to fit. To avoid this, make sure your images are the proper width and height. As below:
Background Image: 600 pixels x 187 pixels
Preset Background Image: 186 pixels x 32 pixels
Fader Cap Image: 22 pixels x 37 pixels
Button Image: 195 pixels x 27 pixels
Rotary Image: 6966 pixels x 54 pixels
REF: http://www.cakewalk.com/Support/kb/reader.aspx/2007013267
The devil is in the details... 
yes, something weird is going on in my knob renders... thanks for pointing that out.
I am pasting together 129 54x54 pic squares but it's ending up as 13,000+
Aha... I just figured out what happened I did a re render and... they'll be fixed by tonight. :-)