Let me reply to the easier question first!
Yeah boy! After all the years, I realised that my main interest in this hobby is to conduct science experiments instead of listening to music.
It's possible to place the Qutest to the middle but at a cost, longer right-angled and more straight but more contact points. Thanks to the beauty of the 360 degree rotation feature.
I dismantled the Qutest from test case No. 1 for illusion purpose therefore no listening experience yet. That will be test case No. 5.
And at test case no. 6, I will isolate the HMS and Qutest by inserting an aluminium foil in between, and short the aluminium foil to the ground to find out how effective it is.