I have begun collecting the location of websites useful to me. You might find them useful if you haven't already discovered them. The most unusual one is Chris Glad's angle calculator because it is the only one that does butt joints. I used it to find the compound angles needed for the "reclaimed firewood" set where I used finger (box) joints on two of the items. (see portfolio)
Dan is an experienced woodworker who is anxious to make an heirloom of the future for you.