Does look interesting Bob. I don't have a problem with wire uncoiling, but for storage it would be very handy. All I do is cut a small notch in the edge of the spool when it arrives, fold the wire over into the notch and stick the end down with a bit of insulation tape. Not had a spool unwind yet.
At the moment for my large spools I am using the base with centre pole from a 100 CD case cut down the base of it and it fits inside a circular caddy box (the food type that has 4 clips on the top), and I use postie elastic bands to hold the wire secure on each spool, but still like the looks of that, for sheer neatness, and ease of use, once you coil the little bobbins. Will definitely get one when he gets them back in stock.