Ok, you've got me confused now. I never said talk to Pangolin, that was Al. If you want to light the LEDs you'll need to be able to send feedback to the APC. Doesn't matter what software it is, but it'll need to send feedback. The value you send back will dictate what the led does.
I have no idea what you mean about the slider affecting colour. Do you mean colour of the laser? That is something you'll need to map in the software.
Laserlips, I would imagine cost might be a good reason why you wouldn't mix DMX as a starting point.