Thant's very valuable information!!!
The higher the drag, the more resistance to movement. gf is grams force.
Regarding the other values, I think the higher in the front will give you more steering, the higher in the back will allow you to turn harder without loosing the back...
Anyway, not sure about the negative values, does that mean the body actually lift??
The Blue Armada: Tamiya TRF415MSXX, Tamiya TA05MS, Tamiya/Xenon TA05
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Sanwa M11 DSSS, KO Propo Servos