I use Hpi Red inserts with Sorex 28's really good in the winter..
As far as the sus arms go.... . the 6505's must be new..?? But I would get those if they are Harder.. the arms that come stock with the Barracuda ...are to flexable..
...I never did use them... I use the Square front and rear arms that are pretty "BEEFY" but they also cost a grip
... But now Speedway PAL has a short arm coversion that uses the Graphite CE-4 sus Arms that are next to indistructable
which is about the same price as the Sqaure Nylon arms....
And for the stabilizers...
it might be a Track by Track thing but I use 1.4mm ones up front and 1.2 in the rear... with 40W oil up fron and 35W oil in the rear...But then again I have a local track with a Sh!t load or switch backs..