Thank you for your reply, most appreciated.
I"ve started all of my ST3 tracks with both the song volume and individual multitracks at '0' db's, and then have amended to suit/balance with each other.
I think the fact that there seems to be exponential increase the further you turn the volume of a devices output ties in with what you have said.
I've never been confident that clipping won't occur if one of my device's volume is on full, probably because my old analogue devices always used to clip.
But if you're confident that an iPad10 wouldn't clip with the output volume on full then I shall start cranking all the way!!
Thanks