John your post was deleted? why was that.
I can't find the reference to guardsman made by (I thought) Derek Bolton, but may have been John.
I know Dri-Pro comes with its operating instructions but is this the same as the H&S standards? Put it this way you can buy electric scooters no problem, but you can't ride them on the roads, or paths, so they are no good for anything. Just cos their is a product you can use in the custard home, is it actually allowed?