Hi Audrey,
There’s a good chance that I don’t understand it all, but because of this sentence I’ll post a link in the hope that it will be of some use to you… I’m very unfamiliar with this area, so I don’t think I can be any good help. …at random this with the best intentions
There may be a lot more in it for you (or confirmation that mids are important), but I’ll just bring up Lieven’s…
Have fun and in that thread you can at least find out from whom you can ask help from and whom beter not (like me)