Thank you all, I have met with some success.
in case anyone else asks;
SSD used: OCZ Arc 100, 240 GB SSD
Enclosure: innatek USB 3 enclosure (UASP supported)
Method:
Used CCC to clone mac hard Drive (minus user profile) to SSD.
Once completed, in System Prefs. selected SSD as boot device.
Rebooted.
Selected my home folder on the original drive via system prefs.
Rebooted again (mush faster now!)
So now I have the OS on the SSD and my user data on the HDD.
Speed increase is very evident, but I might get even better by buying an even bigger SSD (500 GB) and repeating but this time moving the user profile also.
So far, excellent, thank you all![]()
You'll get even better performance if you buy a PCIe blade pulled off other Macs on eBay, and stick it into the PCIe slot in your Mac Mini.