FS, I just want to re-post some information which I posted a while back but you seemed to have missed.
ATL
In the main checkpoint, the lanes with the MMW are actually 12-15 (not 13-16), and 21-22 (lanes 23 and 24 do not exist). In the south checkpoint lanes 2/3 and 4 have the MMW (a total of 2 MMW devices) and lane 1 is WTMD-only.
SRQ
There are 3 MMW devices, which means that each pair of lanes has the NOS.
Also, at ATL Atlanta, the first post of this thread says:
Center Checkpoint Lanes 1-4, 13-16, & 21-24 have MMW installed
On the right side (lower numbers), I saw an MMW at lane 4 and lane 12 only. SDOO is easy, as long as they have many lanes open. Note: They had two entrances to this one checkpoint. Seems like the right side gives the best odds.
As I posted above, there are actually several MMW devices in the main checkpoint, but ATL has always been a very, very easy SDOO for me. Lanes 10/11 are typically my go-to lanes as they are the first WTMD-only lanes they will open after all of the MMW lanes have been opened. Even during slower periods when they don't have any WTMD-only lanes open, the TSOs are not agressive when it comes to sending pax through the MMW. During my most recent trip through the ATL main checkpoint when no WTMD-only lanes were open, the TSOs were letting pax choose their own fate, so the only pax that went through the MMW are the ones that walked up to it. The WTMD was definitely the more popular option. In fact, there were times when the MMW didn't even have anyone in it since everyone was choosing the WTMD.
And yes, going right is the better choice, since you can access lanes 10/11 from there.