I'd like to ask for some sort of muffling module. The flinger and extruder at least are kinda loud, and the in-game configs for those sounds/particles dont seem to be working.

As it happens, I'm planning one for the next release anyway. So yes: feature request accepted!

I'll check the config issue as well - it should be possible to disable all noises in config.

Just tested configs for flinger and extruder effects, and they work fine:

    # Play sounds when Extruder Module extends or withdraws
    B:extruderSound=false

    # Play sound & smoke effect when Flinger Module flings an item
    B:flingerEffects=false

With these, there are no sounds/particles for the flinger & extruder. Be aware that these need to be set server-side (since sounds/particle packets need to be sent to all nearby clients). Just setting client-side won't work.

Muffler Upgrade has been added in v1.2.0, just releases.