If Holeshots have trouble in the dust then Double Dee's will too, in which case it sounds like Goosebumps will be awesome
To start with use the inserts that come with the tyres, leave the rear as it comes out of the packet and cut the front to the width of the tyre and see how the balance is. If you need more steering cut the front a bit more (width of the wheel), if you need more rear traction again cut the insert to the width of the wheel.
Don't forget to always cut the outer edge of the insert to 45 degrees to fit the shape of the tyre better! I'll try to illustrate but the forum messes up the formatting
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