[GPS1]

Just a few things:
Part number U3381 - Front wheel hex, is an up-grade part and should not be in as part of the standard kit!! This was a picking/packaging error and has been included in some of the first kits by mistake!!
Also, the offset of the hex's will let you run Losi front wheel but not JConcepts or Associated B44.
The Yellow springs included in the kit are the new type, but the new spring tunning kit is not on sale yet!! However, the old type spring tunning kit (medium/small) is and works fine.
As for spare's, I'd order U3131-Alloy Spacers 0.5/1.0/2.0mm as you don't get enough in the kit to make adjustments! U1573-53mm Titanium turnbuckles for the rear, again so you can make adjustments and run longer links to help the handling. They also make a 37.5mm rear CF Link Mount which all the team cars are running, but I'm not sure of the part number?
Hope this helps!