I am curious to see. Adding the SSR helped my prints come out nicer. I didn't have the banding to that degree however. I did at first. The firmware provided from Colin had me over extruding quite a bit. Only once I had my machine calibrated better and then adding the SSR was I happy with the prints.

I think in this case adding the SSR will help. If you still have banding issues (The may be smaller) you might have a extruder calibration issue too. I still chase that number all the time. It is why i have modified my firmware so that the knob on my display adjusts the extruder multiplier instead of the speed while printing.