Thank for your responses, I'm getting a bit paranoid about doing this as there seems to be so many opinions about 'how to'. One thing has come to mind with a CF solution, does the original Os write back to the drive for caching etc? Just thinking about the limited number of write a CF might have. Has anyone tried an ssd solutiion? Apologies if the questions appear very noob :-D
I have been using 4gb to 32gb cf's in almost all of my amigas for many years(sandisk,transcend) and have yet to have a failure.
Cf's are quiet,fast and ultra low power and make the slowest amiga feel faster with the fast access times.
My main A4000 mediator/csppc amiga uses 2-32GB cf's for over 7 years now and runs 24/7.
If you go cf,buy good media and beware of media from ebay,as much of it is counterfeit.