Right. got it. I better go dig out my 8.5 disks. I think I can do the bare bones and un check 90% of the install if I remember correctly. I won't bother with X3. 
Thanks once again. 

Depends what you need from 8.5
 
You can install Pantheon without having to load the main program.
If you need V-Vocal then you do need a minimal install so untick everything apart from the main prog & Pantheon

I installed 8.5 and unchecked everything except Pantheon, Session drummer 3 and Guitar rig 3. 
I wonder if I uninstall it,   if it will also remove those features,,??  I might try this.  
 
Amazing how quickly installing everything went because all the downloads were already there locally. 
DimPro for some reason took it's time. 
Almost everything is installed now and  the C drive is  only at 65 GB. So lots of head room still.