> I'm not sure I have an opinion yet. Mainly because I'm not clear what kind > of messages you want these piper instances to exchange. I'm sorry if the > best answer to my question is "tfm says that", I never managed to get a > clear understanding of the roles of the various piper layers when reading > the documentation. And I never got time to read the code... Oops. Probably too obvious to us. There will be a layer document soon, I'll write a draft tonight. jarl