Two things YES and YES, Let me explain the Bar end weights Do wonders! (which manic makes in Black Powder coat, Chrome, Steel or SS-I got the SS) http://www.manicsalamander.com/bar_end_weight.htm
And YES the bike will smooth out with time but not completely So to really get rid of those 4500-5000 vibes the Barend weights are the Best option otherwise the Bar end Mirrors do a great job also Just depends on the look you want to go with
http://mphcycles.com/CRG_Mirrors_Levers.htm
Once that is out of the way I can't fault anything on my Goose and love it more everyday