As a general rule for spacing make the hawaiin 'hang loose' symbol. Thumb and pinky sticking out all others in. With my hands the distance from tip of the thumb to the tip of the pinky is almost exactly 17cm (dina). Measure your hand and adjust accordingly.
EDIT: A shure a27 vert bar make it very easy to get angles dead on.
I thought i was the only one who did this...hahah.
i've run DIN DINa and XY. the venue that i tape in the most sounds best with XY. i think i've only run DIN on state and have never tried ORTF but might have to check that out next time i get the opportunity.