I would replace that part, as you said you don't want that to be sucked in to the engine as that will cause permanent damage to it, to the point a replacement engine will be cheaper than fixing the engine. PS doesn't have to be new you could pull it from a scappy as long as it's in goood state, clean it and put it on.
PPS that isn't to bad i've seen way worse cleaning intakes lol. The fault was coming from that one valve that was staying open...
100% new parts inc gaskets on order ,as well as a set of 6 glow plugs
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Bosch cancelled,ngk ordered