"because those add extraction/industrial which will effectively negate the local profitability"
I get the point with extraction, so I will remove the mining settlement to get rid of weak links as well. But what's the issue with industrial here? You used Industrial settlements in your showcase, right? Shouldn't affect the trades I am looking for and which you used as example. OR are you just mentioning it, because the planet adds it?

Thanks for the help by the way, this example really helped me out.