I also run my 184s using only 1 shockmount.
The shockmount is kinda like a clamp so I dont need
the threaded rod to keep em straight. I just clamp the stock
mounts in there and booom DINA
I just use a thread adaptor to get the extra 3 cm for DIN.
Also, you might have to run RA out of the mics to get 90.