Andrea,Do you just undercut or do you also do a little "over" on the other side. I had been just undercutting and leaving the "top" side at its natural point and what I ended up with by the end of the show year was mane only on half of the crest and some people were telling me I should trim on both sides so it's more even. I don't know if I've explained that well enough for you to even comment.
Okay, what I am assuming you mean is to undercut AND cut along the top of the mane, too... so that the strip of mane that you leave is basically the "middle" of the crest along the top?
Yes, people DO do this. However, I personally don't really like it because it is OBVIOUS the mane is cut and it looks really bad on some colored horses (particularly where the mane is a contrasting color to the coat). And it is hard to trim up for touch ups between body clips. Once you clip that hair, you really can't let it grow back in because it looks super terrible. Whereas, clipping only UNDER the mane looks bad for just the time it is sticking straight up... once it is long enough to lay down (mane tamers and slinkys help speed this process) you at least still have the original long part on the top to cover it. But, to each his own I suppose!
I hope that answers your question...
Andrea