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UPREV downshift blip

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Just wondering if anyone knows how to control the ETC downshift blip with an uprev? I've got my tune exactly how I want it on a 370z AT. The downshifts on the paddle always have an aggressive downshift throttle blip. With my tune however, when off throttle and under decel, the downshift lunges the vehicle. I think it is because I have fuel dumping and a bit of retarded timing when throttle is off on deceleration, so when it spikes the engine its getting a lot more fuel than it used to. I was wondering if there is any control in the uprev to tune any part of the throttle blip. I imagine it would be the same settings as the syncro match system on the manual. I have tried turning ETC off but the AT becomes extremely laggy.