Jony I did see that grinder, but the K4/K6 seems better value. But I’ll keep a look on ebay if they do pop up for a good price used.
Cuprajake Too far out of my budget! £100 is the max I’ll go currently sadly.
Dusk Yes but there’s no fun in that! I think it’ll be fun to design and make something, and if works well enough I could sell a few to cover material costs 😉