Using Module Manager to suppress some engine effects

[MaxPeck]

So I'm trying to use Module Manager to suppress smoke exhaust effects from engines in atmosphere, as well as surface jet blast.  Both of those grind my system to a near halt while flying in atmosphere.  Here's what I've cobbled together, but I'm not a code guru so I have no idea if the syntax is right.  Can some of you guys check me here and/or offer ways to do this better?  Basically I don't want big puffy clouds of smoke behind my jet/prop/rotor/fan engines in the atmosphere, and I absolutely don't want downwash kicking up dust from the surface - both of which are major performance killers for me.

Here's what I've got:

@PART[*]:HAS[@MODULE[ModuleEngines]]
{   
    -fx_smokeTrail_light
    -fx_smokeTrail_medium

}

@PART[*]:HAS[@MODULE[ModuleSurfaceFX]]
{
	@maxDistance = 1
}

Or how about this...

@PART[*]:HAS[@MODULE[ModuleEnginesFX]]
{
    @EFFECTS
    {
        @PREFAB_PARTICLE:HAS[#prefabName[fx_smokeTrail_light|fx_smokeTrail_medium]]
            {
		@emission,* = 0.0 0.0
            }
    }
}

@PART[*]:HAS[@MODULE[ModuleEngines]]
{   
    -fx_smokeTrail_light
    -fx_smokeTrail_medium
}

@PART[*]:HAS[@MODULE[ModuleSurfaceFX]]
{
	@maxDistance = 1
}
	

Yes? No?  Help me out, oh coding masters.  

Thanks!

Edited March 9, 2018 by MaxPeck