i did record some instruments played by friends (sax, percussion etc.) and used them in tracks, but i always do the actual tunes alone. there's one friend interested in making trance too, but he's far too complicated and slow-thinking to work with imo (we tried it, but it didn't work at all). also, i guess i am a control freak, kinda; i want to make everything alone, and i'm not very ready to compromise if it comes to things like this.