This will probably induce even greater apoplexy, but it may be useful for anyone reading this thread who wonders what all this stuff is about, so here goes...
The following is a link to an interesting series of pictures showing a DIY AoA indicator in action on a Super Cub in various phases of flight:
http://www.supercub.org/woe/woe0402.php
(It's a .org website, so dear moderator if possible please don't delete the link.)
QDM