here's a great post by JP Gerard from the adkmic forum about configs with the TLs.
"The basic configs are AB, XY, MS, ORTF, NOS, OSS etc.
You can find them with diagrams and full expalation on the net but in broad strokes:
AB: typical spaced pair, there are no real guidelines... but the 3:1 rule is worth keeping in mind.
XY/Blumlein: coincident pair, 90° is a good start, placing the capsules on top of each other is a good idea for optimum phase coherence, I usually end up around 80° but some folks use up to 120° for a wide image when taping large formations. Use Fig-8s for Blumlein, 90° angle.
MS (Mr. Blumlein too!): a fig-8 and a (typically) directionnal mic going through a matrix that basically flips the phase of one of the fig-8 mic signal after multing and mixes it with the cardioid.The balance between the mics will determine the center "depth" or stereo "spread". Select the directivity of the M mic depending on how much "room" you need in the stereo image.
ORTF: variation on XY, 110° angle, "near coincident" since the capsules are typically 17cm apart.
NOS: like ORTF config but 90° angle, 30 cm apart.
OSS/Jecklin disc: a baffle around 1' between two omnis, approaching binaural performance."