[RTTY] Which sideband for MFSK on 80M?

[Wes Cosand]

Which sideband is preferred for MFSK on 80 meters?

This seems the ideal mode for a noisy band but I think there is confusion 
about which sideband to use.  IZ8BLY says LSB but MixW instructs users to 
use USB.

So what do the cognoscenti say?

Wes, WZ7I