OK, just getting home from work and I hadn't transitioned from stressed out mode to party mode.
Using Win7 and Mini-tool 10.2.1 free , copied my 480GB Sandisk Extreme Pro to 2TB Crucial MX300 via USB to SATA cable. Chose defaults - Replace system disk with another hard disk, selected destination disk, fit partitions to entire disk and align partitions to 1MB. After finishing you get 1 operation pending. Click Apply and it starts copying. When the drive C in use dialog comes up, click 'Reboot now' and it will reboot and perform the operation, then reboot back to Windows.
Everything looked OK, so I shutdown and swapped drives. Booting the new drive, I saw a windows message about installing SATA drivers I think and then a dialog to reboot for changes to take effect. I rebooted and checked the drives under Explorer, but the second partition wasn't showing up. A quick trip to Disk Manager where I assigned it a letter (same as old drive) and all was fine. I still running with the new drive. No problems yet. I'll run some programs and access some data to see if I encounter any problems. Not sure how long before I throw the old drive back in, I don't want to change too much because I had other plans for this drive (going in my Ryzen build),
Total time to copy a little over 400GB was around 28 minutes.