Bob, re the shell end mills, I have had the same problem. My mill came with two shell end mills that had 1" bores but no arbor was supplied. I could not find an arbor with a 1" shaft and an ISO 30 taper so I bought one with a 22mm shaft and turned up a sleeve to suit. Worked well until the cutters became blunt, I have not finished my Quorn yet so they will have to wait awhile.
Mm. (Phillip)