just a quick note, the actual number/value of the Level in the Amp block has no significance. you can set all your amp blocks to -15 dB and they will all be different levels due to Drive, Master, and many other settings. so don't rely on that number for a specific volume result.that's what i figured and its the reason why i set the amp block at -15 to prevent any clipping leaving me enough headroom for louder patches.
(perhaps you know that, but the way it was stated might lead someone to think opposite of what i clarified)