Andrew924 wrote:
I'm wondering where to go for the clearest, most easily understandable trimming advice. A few weeks ago, ... I ended up ruining the whole thing.
Andrew - what Schnauzer is trying to tell you is what you have already experienced. Tr*mming is usually the way to "ruin the whole thing". The center (US sp.) hairs are *required* as part of the whole. If you find they are getting in your mouth, you sweep them to the side, and sweep them to the side again, and keep sweeping them to the side, and they will eventally start to obey.
If they still don't behave, use glue stick to tame them - see EricJT's copious "World of Glue Stick" notes, posts and Blog (q.v.)
David