This little 450C runs great so far, but one thing I notice...…..when steering, shifting from high-low & vise versa it hits pretty hard, sort of hammers the drive train. I try to just slip into neutral on the one side to reduce the hammering, but sometimes it is necessary to make a more positive turn & necessary to put one track into low or high for the turn. I wonder, is there a modulation valve built into the system, that can be adjusted to "soften the blow" when turning, or shifting back & forth from low to high on both tracks simultaneously, when demand calls for it?