4 Probably German Techno from 1990-91

Please help! :)

listened to all 4

ive got a shedload of deutsch techno from that time .. but dont recognise any ..

except 3 . at the start before it leaps into a german techno track is italo house - artist = sueno latino, track = luxuria.

Thanks for looking. Sorry I didn't reply, I've been away from my computer. I might try posting these on discogs to see if anyone specialises in this sort of thing.