Thanks jander, carney, WSM for your inputs. I did a little more poking around the internet, especially at the Yahoo Indoor Construction Group.
I noted that there are differences in opinion among the "experts". Some like flying nose up, with thrust in line with motorstick and hence up. Others don't like this and prefer nose level and thrust level during flight.
There were a couple of reasons cited by the proponents of nose up flying. First, when the nose is up during cruise and descent, the propeller slows down, and this contributes to a longer flight. Second, others have noted that if the nose is not up during cruise, the plane will take a small dive and lose altitude when cruise power is used up. The common static set up to achieve nose up flying is to set the wing level with motor or slightly positive and have the stab slightly negative wrt the motor stick.
In two of our planes, even though the wings and stab incidences are both positive relative to the motor stick, they cruise slightly nose up. These two fly nose up and have very smooth transitions from cruise to descent.
In a third plane, the wing and stab incidences are more significantly positive, and the plane cruises with the motor stick level. I have noticed that this plane suffers a 3' level drop (a small dive) at the end of cruise.
However, the proponent of level thrust, level motor stick flying is a current world record holder. (The proponents of the nose-up school are also world record holders.)
What's to make all this? One, use your stop watch and measure your trim by time. Discussing theory and other people's opinions/experiences is useful, but make enough measurements yourself so that you can better understand the theory. Continue to question, experiment, and analyze.