I think you need to go more links not less... the tighter the bars the more weight that is transferred to the front axle.
As a side note when I had a system like that and found what was right for me I painted the link I used so I did not have to count links or even remember..
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
140 days boondocking in 2016
211/2015, 196/14, 247/13, 193/12