I made a mistake, but your answer was what I was looking for. I meant "mix", not trim. On a Zero I have, I installed flaps, mixed some down elevator and off I went. When it came time to land with flags deployed, the plane came in slighty nose down, so I had to much down elevator and I had to really get on the up elevator to get it in. What I didn't see was the "increased" lift with flaps. Next time I won't mix in to much down elevator and see what that does or just don't mix anything at all.
Larry
PS Another possibility was I didn't come in fast enough or under enough power.