i have a Gravel hound too, it works fine with me. i never had any understeer problem for the stock setting. you might want to change the upper hole at the front upright. Or you can visit the Radiocontrolzone. theres alot tips on the DF-02.
TA04ss / TA04TRF / TB EvoIII/ TB02 /DF02 / M03L / TRF414m2 / TRF415 / TRF415MS / TRF415MSX / MRE