Help finding loadouts of generated ships

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I've managed to make every race use only race-specific equipments (Terran mounts only terrran, Split mounts only Split etc), with some crossover.

I've changed all loadouts both in libraries/loadouts.xml and the various md scripts for generated ships during missions. So far so good.

Problem is with ships generated by job.xml, Argon S and M ships seem to always "want" to mount Paranid engines. So the generated ships have no engines, because I removed their compatibility through tags. They should instead mount the Argon engine but they don't.

I can't find it but maybe there is a script regulating the default engines for generated ships? Or should I add the loadout in every job entry? (loadout in jobs.xml seems to only refer to level and variation, not equipment specification or any loadout ref).

BTW I managed to create new loadouts for all spawn ships (I add many in XRSGE) so that approach works but I noticed that generated vanilla ships mostly use Paranid engine so I suppose this is coded somewhere.