Thanks for the pointers. I had seen Easygoin post but it is a bit out of date now. A couple of questions, do I now just create the image on a usb as per the manual and calamares does the rest.What size would be recommended for the EFI partition, also separate root and home. Arch suggests EFI 250MB, Root 35GB and the rest as home but I have seen several other wildly varying alternative suggestions.