John -I design to get the neutral point I want .
However - we will be flying a new design - using the collective pitch prop very soon and my guess is the we want to be as close as possible to having the model such that it will be shorter coupled and with minimum tail group size - so that when reverse pitch is applied -it will stop and back up for at least a short interval .
I don't think there are any books which cover this - so I will have to cut and try .
I think the reverse appied in a vertical dive or climb will do this best.