Hi @Bassworks, yes, it would keep the Big Head unit intact but, for me, pretty much 100% of the time I'm likely to want to use the headphone amp, I'm going to be sitting down anyway, so wouldn't have the strap on.
I'm looking to minimise the amount of gear and cables I need to deal with, when I want to rehearse. Ideally there would be a Bluetooth receiver in there as well, to feed the audio input of the Big Head, but that's an additional level of complexity for now.