As a point of discussion, IF you still have air in your wing at reserve tank pressure, you might be able to ditch the tank adapter. This moves the weight closer to your central axis yielding a reduced tendency to roll. There are soft (low profile) stabilizers available, and some people find their tank stable just with the pressure of the bands against the backplate alone. This does require your backplate have slots for the bands, of course, but most do these days.
ETA: if you ditch the STA but are then underweighted at reserve pressure, putting the needed weight in trim pockets on your belt will further reduce the tendency to roll.