-RM-- here is the straight skinny--
Your MVVS setup is totally unlike the old FOX setup -with a piece of wire -you can feel the inside shape of the MVVS- different setup altogether and the old peaky ON/OFF FOX setup is simply a blast from the past.
Install th MVVSsetup -add quality 18x6 prop and Mobil 1 at 32-1 - go fly-it is that easy and my setup (as noted is very easy to hover adjust power - You may as some do - elect to add some expo along the lower end of the throttle curve --especially at about 1/5-1/3 opening of carb. There is no bounce up to "going on the pipe" with this setup .
Ifyou grossly overprop it (less than 8000 rpm on the ground set ever slightly rich - then yes-- there may be some grumbling but the spec calls this out - the pipe setup is for over 8000 rpm use.