I take it to 10. If you are going to go... go big.
On my Ultra, setting the MV to around 9 was considered wide open on Fender amps (I might be mistaken about that number). Is that still the same on II? Or do I go all the way to 10? Just curious if it changed in new algorithms.
This is the same on the II. For non-master volume volume, crank the Master, and then use Drive for volume.
The manual says to set it at or close to max. In the troubleshooting Q&A it mentions a value of 8+.