The snow is a great kit , it has something far more tractable then a hobb switch , with is either off or on, it works just like a progressive Nitrous system, using pulse with modulation. I like the fact that it comes on with boost, and EGT, The three D version will look at Boost ,EGT and the Delta Curve of the EGT {the rate of rise } and take water out at what every level you preset it to. I like it when your pulling a load and you use the windshield washer reservoir, that way when its empty you get a light on the dash. The water come on very progressive and will not quinch the motor, allowing you to run a higher volume of water then just turning it on at a preset boost level