Blue Ox Swaypro how many links?

Blue OX has changed their instructions since I purchased our hitch a month ago. Originally they had you put the 9th link from the end (counting from the green end to the bar end) into the slot to start with then go to the 10th or 11th link if needed. Now they want 3 full links showing between the bar and the latch to start with which is the same as the 9 link from the bar. Mine works best in the 11th link. This is with their 2,000# TW rated Hitch with the 2-1/2" shank. My TH tongue weight is north of 1,600#'s dry Hitch weight. 104 gallons of fresh water, batteries, and LP adds to that but 40 gallons of fuel and a Polaris RzR parked forward in the rear offsets much of that so the difference loaded or dry is similiar. To date, we have not experienced any sway issues.