Retry XeRun 120A 1s for 1/12 racing 17.5T stock.
I change firmware of Xerun Speedpassion 20110322 stock.
But so firmware of Speed Passion(20110322stock) is as same as HW's 20110211stock.
Vary soft feel,is too soft & very slow with D3 17.5T.
And more,if you change SP's firmware from HW, you can't update(back) to HW's at direct.
Root is Change SP's FW v1.x , after that to HW V3.x.
However I don't know what is best choice and I can't find best setting for D3 17.5T yet.