the spacing on the AEA stereo bar is 11.5 cm
is too close for spec ORTF or DIN
which needs a ~17 cm spread
there are other (wider) stereo bars that might better suit your needs
if you intend to do ORTF or DIN patterns
if you need a protractor for positioning your mics:
download this:
http://www.taperssection.com/reference/pdf/MicConfigTemplate.pdfthen buy yourself a cheap protractor at a dollar store somewhere
and take your stereo bar and some paper tape
and mark off the angles with the protractor onto a small piece of paper tape stuck to your bar
per the diagrams on the config template
label it ORTF or DIN or whatever
this way you can switch patterns by aligning the mics according to the marks