Just so you all know the listed power band for the 400R is 6400-7000rpm. 7000 is not the redline and with VV7 you can adjust the redline some.
I did it with my 300XS and it doesn't take any special computer mods. I spoke with Nordic and Mercury before doing this and adjusted mine to 6450rpm redline when the factory sets the power band at 5400-6100rpm and 6150 limiter.
there is no way you can adjust the RPM limiter of the 400R through a VV7. it is a monitoring device only. who from Mercury and Nordic showed you how to do this?