What is the purpose of 6,8nF capacitors on SID module?
Is it crytical to be styroflex 2.5% tolerance?
I didnt find sugested caps so i take ceramic caps with greater tolerance (about 10%)
It works but I`m worried how can it affect the SID?
I also made optimised C64 supply. And in that case I should remove rectifiers and regulators from SIDs and Cores and jumpwire some pins? Right?
They’re for the filters. There’s a bunch of technical stuff easily found if you feel like googling it but the short version is this: The better the caps, the better the filters sound. Get the good ones, it’s totally worth it, especially if you’re into synthesis and need them to sit on a certain frequency or resonate at a certain level.
OK Stryd, thanks. I will try to find better ones in that case. 
I would also suggest 22nF capacitors for the 8580 and 6582 instead of 6.8nF.
Seach for other posts about this topic, in short, 22nF will give a better frequency range with less stepping at the low end.
Cool, I`ll go with 22nF then. No need to experiment by myself.
Thanks Wilba