ThunderPuss problem (updated with a new noise-problem)

[Loztboy]

I think I finally figured out what was wrong.
There was a bad trace between c3- and the pot leg.
This probably happened because i mounted the pot backwards and had to desolder it to put it on the right way.
Thanks for all the help.

[Loztboy]

Update I found out that the noise problem was caused by a bad power supply.