Managed to record, with my cell phone so the resolution is piss poor, the beat of a three-story high pressing machine at an assembly factory I worked at for a few months until they kicked me out. I recorded it from the office right next to it so it's heard through the thin plaster walls, made the table shake, heavy as hell. Didn't own any proper recording equipment back then so that was what could be used. I think it's used onthe first Pestdemon tape, not sure though. The factory produced car parts, mainly chairs.
That SSI site was amazing. Some noise musician should apply for a job there...