Bselik
You misinterpreted my poor explanation.
Each hand has differing strengths for rotating the sticks forward compared with backwards and perhaps even greater differences when applying roll one way or the other. To achieve harmony the force required for a particular roll rate will differ for each stick because our muscles rotate our wrists more strongly in one direction than the other.
Then again if we want the controls to assist in limiting maximum positive and negative g applications we will want to adjust the slope of the SF/g curve to suit the standard man's wrist strengths forward and backwards. I think we can pull a side stick with more force than we can push.
To complicate the whole problem will be the differing angles of movement of particular side sticks before you reach stops and the need for flight control systems to have Q feel . (ie. indicated airspeed).