For those that are interested...
Got some track time with the new Speedmerchant Rev4 today. Other than having to tape the batteries in, the car has some welcome changes. I noticed quite a bit of increased rear bite (no more losing traction at 6 mins!) and the car seemed to transition better, and had great cut. Overall, much more drivable, stable, solid car. My lap times were as good as or better than with the Rev 3 (and the track was SLOW today)
I dropped my Rev 3 setup right on it, but ended up with some stiffer side springs after a couple runs; to get the back end to rotate more in the corner.
See ya