Flying a club LS-4a last weekend, trying to trim for a sandwich break I couldnt get a smooth speed. I figure this is a balance issue, as we would rise to 65 knots then fall back to 45 then up again. I would be 95kg clothed, no extra gear. I tried different altitudes with the same result, although higher speeds smoothed the dolphin tendency a bit, I wasnt in that much of a hurry. What am I missing?