Janet wrote:
Professional gardener friends run an amazing biodynamic veg garden and
have been using these tools for a few years. They swear by them, and
brought a couple to the last meeting of our local garden club to show
us.. I am smitten by the Sirius hoe :-)
Anybody else tried them?

http://www.implementations.co.uk/site/home

Nick impulse-bought some hand implement thingy from them, which I have
to admit, has hung on the back of the shed door looking unloved. :-(
It was a bit of an expensive impulse-buy, but probably not his worst ...