[repetedj]

Instead of trying to mount a laptop onto a music stand. here's what I did.
Purchased a touch screen monitor (15.6 inches) and hooked it up to my laptop as a second display.
Mount the monitor on the music stand.  
Open MSpro  and extend(move) it's display over to the touch screen monitor.
MSpro runs on the external monitor and I can then use the laptop screen for whatever other app I need at the same time..

You can buy a 13.5 touch screen if you want smaller.  I recommend the 15.6 though. It's larger than most tablets

The monitor weighs much much less then a laptop and it is very thin.   The monitor I have is mounted on the  built in music rest on my keyboard.            
Hope this helps.

Which brand of touch screen monitor (15.6 inches) are you using?
Thanks,

Sorry for the delay.
I am using a wimaxit 15.6inch touch monitor. Plugs into the USB port and the HDMI connection on my laptop or you can use the Type C connection on your laptop if you have one.  Price was around $200.  Much less expensive then a tablet (providing you already have a laptop/desktop)
I then open MSP and then move the screen from the laptop to the touch screen monitor.
So far it has been flawless.
https://wimaxit.com/