Acetone? Maybe that is what my Chroma Polaris needs. I am having issues with envelope volume release. The time counts down and the volume just ends instead of fades plus some of the functions barely work. Like the modulation routing options...
Wait - can you explain what's going on with your Polaris? I too have a polaris and if you're referring to envelope volume release perhaps cutting out abruptly, then we need to talk about calibration of the unit, which is well described in the manual. The polaris is extremely well thought out and has very good documentation, even if the manual is very thick and it's perhaps convoluted.
This makes me think that there's a lot going on that you might not be aware about:
1) Do you have a new membrane panel on the top or the old one? We can figure that out if you don't know.
2) Do you hear clicking when you press buttons? This can be turned on/off as desired.
3) What's wrong with the modulation routing? Could be something to do with a bad membrane panel which is pretty cheap to replace - I would totally do that if you haven't yet Paul DeRocco, who worked on the Polaris (I believe) made new membranes that do not suffer like the old ones.
...now - I'm pretty sure you said you thought the Polaris sounds "thin" - obviously it's subjective, but thin is probably one of the last things I'd call the polaris. I've made a few videos of it and honestly it's about the most massive synth I've ever heard. Of course, I saw this thread cuz I'm wondering about getting something like the OB6 or Prophet 6, but not necessarily to get rid of my Polaris...
Here's a video of me using mine:
https://www.youtube.com/watch?v=8LyoNGZOfcQ