Tom, > Here's the $64 question - which of my two versions is better...or are they > equivalent? Here's how I would do it. No muss, no fuss, no triangles at all: http://w1.411.telia.com/~u41105032/bilder/12PT3.GIF 11 ready-made hinges, and collimation screws that you can reach from above. Nils Olof