This is an older thread, but this came up again. I did a tutorial in the newer thread, that shows a possible way to approach this problem using layered shapes and scripting. Here is the link:
Slider Object customization
This is an older thread, but this came up again. I did a tutorial in the newer thread, that shows a possible way to approach this problem using layered shapes and scripting. Here is the link:
Slider Object customization