Its similar with my Lan Evo. It oversteers turning right but when it turns left, it understeers. Try checking to see if its steering is alighned and then use the ST.RANGE settings on your transmitter to make sure that it's at the MAX setting.
For your second question, not all Xmods chassis are the same. The G35 for example uses the LONG wheelbase. The Lancer has a shorter wheelbase (it uses the medium shaft in the AWD kit).
I think there is a shorter wheelbase, seeing as there is a short driveshaft in the AWD kit, but I don't know which cars come with the short wheelbases.
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