it looked nicely build.
that it looks nicely built (unless you are using a magnifying glass) is not a great indicator of well built!
Tho' a few people on some modular communities has the same results with theirs.
yes I know - however, I don't necessarily take a lot of notice - what someone hears as noisy - almost all analog is noisy compared to the mixer in a DAW!! - or 'unacceptable bleed - see above responses from both me and @Lugia - again compared to bleed on a DAW mixer (non-existant) is user perceived at best
Very often, the "hiss" comes from the source, at my place bc I often use saturation or overdriven signals, that is where I use enveloped VCA just before the mixer's inputs, when needed, to get rid of the noise, when the muxer is quiet, that is a cool technique to get a clean-yet-overdriven signal. A bit off topic, sorry..
-- -ADR-
as I said my gain staging may be different than yours... have you tried using the built in vcas?
Utility modules are the inexpensive, dull polish that makes the expensive, shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities