We have a 2015 Subaru outback (normal engine, CVT trans) and are hoping to pull a 2017 Aliner Scout (dry weight around 1400lbs). We did not intend on a weight distribution hitch (have read subaru's can't use them, not sure about that, corporate basically said "we have no recommendation") or an anti sway bar etc. since it's just a popup. However the dealership is pushing the anti-sway bar hard and saying we will almost surely really want it. They use the Curt friction anti-sway bar and want like $190 to install it...how hard would this thing be to install yourself? And do I need one? It adds I think 16lbs to the tongue weight which IS a consideration, but if it added significant safety it would be worth it. Thanks!