I could do that, the drives are different sizes so figuring out which drive is which isn't that hard (Old=0 New=1)...
Only problem is that I'm 100GB short on my M.2 drive (that's why I went with a clean install rather than clone disk in the first place) so I'm contemplating if it is worth the hassle haha
If I decide not to change boot drives, should I do to my 'new' disk what you mentioned above?
(Since reformatting won't do the trick, right?)
Thanks to all for the quick replies btw, much appreciated!