Ah cool, thanks, that's heading me on the right track. I pulled out some MC Projects vinyl last night and spotted one had MPO written in the lead out, but no exchange which is weird. I got loads of vinyl with 'The Exchange by Nilz' in the lead out, I assume they must scribe notes like that into the mother plate.

Although, all the exchange pressed Techno I've got, even the later Hideo Sakuma as Zank (iirc) pressed at the exchange doesn't have anywhere near the same sort of dynamic depth as the Subvoice/MC Projects vinyl. Must've been something they did at MPO?