What insert do you guys usually run in your B4.1 front tires for indoor high bite clay tracks (small track, lots of 180s). I usually stuff a full Losi rear foam (from the BK Bars) but the rear tires I'm getting don't come with foams (AKA Rebars). I'm gonna use the AKA Red foams for the rear, and I'm not sure if I should just use the standard foam included with the front Rebar tires, or cut a rear AKA Red insert in half and use those.