Len,
You do the edges separately anyway, dont you? You cant use it on low profile carpets, but it saves the hard work on really grotty carpets like -Pub/Restaurants etc. I was just getting used to mine when this Yorkshire Asian chappy from Sheffield relieved me of it for a couple of bob (I fell for his sob story of - wife, kids and his not knowing where to take them, to keep them entertained)
I said " there you are S---n, take this, now go and earn lots of pennies for your kids - he didnt like it! Gave it away to another Yorkshire highway man, (Yes, you know the one!) who loves it, but I want it back, I miss it.
Dave.