Hi again and thanks for responding so quickly!
I had CD0: and CD1: already installed from the Amikit:Storage/DOSDrivers. Solution 2 worked pefectly! Bit of a workaround and I got a Guru Meditation to start with but it booted successfully with the OS 4.1FE CD mounted after the obligatory mouse button click. Strangely, however, there is also a "CD0:BAD" icon on the Amikit desktop.
I'm trying to install AOS 4.1 FE but this is now proving difficult as the Install from 3.X option reports a C: Bootloader failed return code 20. I know other users have installed 4.1 FE so I'll just have to google it. Maybe the answer is AOS 3.9 - I have the original Disc somewhere and I also have Amiga Forever 7 - can I reinstall Amikit with a 3.9 build from AF7?